Research on unexplored frequency quantum-cascade lasers using nitride semiconductors

• Project/Area Number: 15H05733
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Crystal engineering
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Hirayama Hideki 国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (70270593)
• Co-Investigator(Kenkyū-buntansha): 鎌田 憲彦 埼玉大学, 理工学研究科, 教授 (50211173) ; 寺嶋 亘 国立研究開発法人理化学研究所, 平山量子光素子研究室, 研究員 (30450406)
• Project Period (FY): 2015-05-29 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥200,850,000 (Direct Cost: ¥154,500,000、Indirect Cost: ¥46,350,000); Fiscal Year 2019: ¥29,770,000 (Direct Cost: ¥22,900,000、Indirect Cost: ¥6,870,000); Fiscal Year 2018: ¥29,380,000 (Direct Cost: ¥22,600,000、Indirect Cost: ¥6,780,000); Fiscal Year 2017: ¥29,510,000 (Direct Cost: ¥22,700,000、Indirect Cost: ¥6,810,000); Fiscal Year 2016: ¥51,480,000 (Direct Cost: ¥39,600,000、Indirect Cost: ¥11,880,000); Fiscal Year 2015: ¥60,710,000 (Direct Cost: ¥46,700,000、Indirect Cost: ¥14,010,000)
• Keywords: 量子カスケードレーザー / 窒化物半導体 / 未開拓波長 / サブバンド間遷移 / テラヘルツ / バンド内遷位 / 超格子 / バンド内遷位発光 / バンド内遷移 / 量子カスケードレーザ / 結晶成長

Outline of Final Research Achievements

In this research, we aim to realize an unexplored frequency quantum-cascade lasers (QCLs) with frequency of 5 to 12 terahertz (THz) and with wavelength shorter than 3 μm by fabricating a QCL using a nitride semiconductor. We observed stimulated emission from GaN-based THz-QCL and confirmed the improvement of its operating temperature. The optical gain of GaN-based THz-QCL was analyzed based on the first-principles calculation. It was clarified that the optical gain sufficient for lasing is obtained at room temperature. We fabricated a GaN/AlGaN QCL on a Si substrate and lifted off the Si substrate to fabricate a double metal waveguide (DMW) type QCL. Current injection was performed and we observed the current-voltage characteristics that was analytically predicted.

Academic Significance and Societal Importance of the Research Achievements

本研究は、新規波長光デバイスの実現とそれらを実現する動作機構の物理的な理解に於いて学術的な意義が大きい。テラヘルツ光は、各種透視・非破壊検査用の光源として注目され、その応用範囲は、各種セキュリティ検査、火傷診断や癌細胞選別などの医療、電子産業、農業、各種工業、食品検査などと幅広い。また、近赤外-中赤外光は、光通信や環境計測を中心に応用範囲が広い。小型、連続動作、高出力が可能なTHz帯QCL、赤外QCLの未踏波長領域が実現すれば、応用分野の可能性は大きく広がり、我が国の経済発展への寄与が大きい。

Assessment Rating

Verification Result (Rating)

B

Research Products

• [Journal Article] Random electric field induced by interface roughness in GaN/AlGaN multiple quantum wells (2019)
  • Author(s): Joosun Yun, Dong-Pyo Han, and Hideki Hirayama
  • Journal Title: Applied Physics Express Volume: 12 Issue: 12 Pages: 124005-124005
  • DOI: 10.7567/1882-0786/ab548a
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Evaluation of GaN/AlGaN THz quantum-cascade laser epi-layers grown on AlGaN/Si templates by MOCVD (2019)
  • Author(s): Fujikawa Sachie、Ishiguro Toshiya、Wang Ke、Terashima Wataru、Fujishiro Hiroki、Hirayama Hideki
  • Journal Title: Journal of Crystal Growth Volume: 510 Pages: 47-49
  • DOI: 10.1016/j.jcrysgro.2018.12.027
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Short-period scattering-assisted terahertz quantum cascade lasers operating at high temperatures (2019)
  • Author(s): Li Wang, Tsung-Tse Lin, Ke Wang, Thomas Grange, Stefan Birner, and Hideki Hirayama
  • Journal Title: Scientific reports Volume: 9 Issue: 1 Pages: 9446-9446
  • DOI: 10.1038/s41598-019-45957-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Parasitic transport paths in two-well scattering-assisted terahertz quantum cascade lasers (2019)
  • Author(s): Li Wang, Tsung-Tse Lin, Ke Wang, and Hideki Hirayama
  • Journal Title: Applied Physics Express Volume: 12 Issue: 8 Pages: 082003-082003
  • DOI: 10.7567/1882-0786/ab2b56
  • Peer Reviewed
• [Journal Article] Optimization of terahertz quantum cascade lasers by suppressing carrier leakage channel via high-energy state (2018)
  • Author(s): Lin Tsung-Tse、Wang Li、Wang Ke、Grange Thomas、Hirayama Hideki
  • Journal Title: Applied Physics Express Volume: 11 Issue: 11 Pages: 112702-112702
  • DOI: 10.7567/apex.11.112702
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures (2018)
  • Author(s): Wang Ke、Grange Thomas、Lin Tsung-Tse、Wang Li、Jehn Zoltan、Birner Stefan、Yun Joosun、Terashima Wataru、Hirayama Hideki
  • Journal Title: Applied Physics Letters Volume: 113 Issue: 6 Pages: 061109-061109
  • DOI: 10.1063/1.5029520
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Variable Barrier Height AlGaAs/GaAs Quantum Cascade Laser Operating at 3.7?THz (2017)
  • Author(s): Lin Tsung-Tse、Hirayama Hideki
  • Journal Title: physica status solidi (a) Volume: 215 Issue: 8 Pages: 1700424-1700424
  • DOI: 10.1002/pssa.201700424
  • Peer Reviewed / Open Access
• [Journal Article] Design for Stable Lasing of an Indirect Injection THz Quantum Cascade Laser Operating at Less Than 2 THz (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Journal Title: International Journal of Materials Science and Applications Volume: 6 Issue: 5 Pages: 230-230
  • DOI: 10.11648/j.ijmsa.20170605.11
  • Peer Reviewed / Open Access
• [Journal Article] Growth of High-Quality AlN on Sapphire and Development of AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes (2017)
  • Author(s): Hirayama H.
  • Journal Title: Semiconductors and Semimetals Volume: 96 Pages: 85-120
  • DOI: 10.1016/bs.semsem.2016.11.002
  • Peer Reviewed / Open Access
• [Journal Article] Structural and electrical properties of semipolar (11-22) AlGaN grown on m -plane (1-100) sapphire substrates (2017)
  • Author(s): Masafumi Jo, Issei Oshima, Takuma Matsumoto, Noritoshi Maeda, Norihiko Kamata and Hideki Hirayama
  • Journal Title: Phys. Status Solidi (c) Volume: - Issue: 8
  • DOI: 10.1002/pssc.201600248
  • Peer Reviewed
• [Journal Article] High-Quality AlN Template Grown on a Patterned Si (111) Substrate (2016)
  • Author(s): B. T. Tran, H. Hirayama, M. Jo, N. Maeda, D. Inoue, T. Kikitsu
  • Journal Title: Journal of Crystal Growth Volume: - Pages: 225-229
  • DOI: 10.1016/j.jcrysgro.2016.12.100
  • Peer Reviewed / Open Access
• [Journal Article] Performance improvement of AlN crystal quanlity grown on patterned Si (111) substrate for deep UV LED applications (2016)
  • Author(s): B. T. Tran, N. Maeda, N. Jo, D. Inoue, T. Kikitsu and H. Hirayama
  • Journal Title: Scientific Report Volume: 6 Issue: 1 Pages: 35681-35681
  • DOI: 10.1038/srep35681
  • Peer Reviewed
• [Journal Article] テラヘルツ量子カスケードレーザーの進展 (2016)
  • Author(s): 平山秀樹
  • Journal Title: レーザー研究 Volume: 44 Pages: 520-526
  • NAID: 130007957296
  • Peer Reviewed
• [Journal Article] AlGaN紫外LEDの進展と展望 (2016)
  • Author(s): 平山秀樹
  • Journal Title: 照明学会誌 Volume: 100 Pages: 115-118
  • Peer Reviewed
• [Journal Article] Enhanced light extraction in 260 nm light-emitting diode with a highly transparent p-AlGaN layer (2016)
  • Author(s): M. Jo, N. Maeda and H. Hirayama
  • Journal Title: Applied Physics Express Volume: 9 Issue: 1 Pages: 012102-012102
  • DOI: 10.7567/apex.9.012102
  • NAID: 210000137743
  • Peer Reviewed
• [Journal Article] テラヘルツ量子カスケードレーザーの進展と今後の展望 (2015)
  • Author(s): 平山秀樹，寺嶋亘，林宗澤，佐々木美穂
  • Journal Title: 応用物理 Volume: 84 Pages: 918-923
  • NAID: 10031104445
  • Peer Reviewed
• [Journal Article] Growth of non-polar a-plane AlN on r-plane sapphire (2015)
  • Author(s): M. Jo and H. Hirayama
  • Journal Title: Japanese Journal of Applied Physics Volume: 55 Issue: 5S Pages: 05FA02-05FA02
  • DOI: 10.7567/jjap.55.05fa02
  • Peer Reviewed
• [Journal Article] Direct growth and controlled coalescence of thick AlN template on micro-circle patterned Si substrate (2015)
  • Author(s): B. T. Tran, H. Hirayama, N. Maeda, M. Jo, S. Toyoda and N. Kamata
  • Journal Title: Scientific Report Volume: 5 Issue: 1 Pages: 14734-14734
  • DOI: 10.1038/srep14734
  • Peer Reviewed
• [Presentation] GaAs系およびGaN系テラヘルツ量子カスケードレーザーの進展 (2020)
  • Author(s): 平山秀樹、林宗澤、王科、王利
  • Organizer: レーザー学会学術講演会第40回年次大会講演会
  • Invited
• [Presentation] Recent progress in GaAs THz-QCLs and towards realizing GAN based QCLs (2020)
  • Author(s): K. Wang, T. T. Lin, L. Wang and H. Hirayama
  • Organizer: SPIE Photonic West
  • Int'l Joint Research
• [Presentation] Recent progress and future of GaN and GaAs-based THz-QCL (2019)
  • Author(s): K. Wang, L. Wang, T. T. Lin, K. Fukuda and H. Hirayama
  • Organizer: 第80回応用物理学会秋季学術講演会
  • Invited
• [Presentation] Simulation and growth of GaN/AlGaN based terahertz quantum cascade structures (2019)
  • Author(s): 2.K. Wang, L. Wang, T. T. Lin, K. Fukuda, R. Zhang, and H. Hirayama
  • Organizer: The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
  • Int'l Joint Research
• [Presentation] Influence of dipole scattering to level broadening and carrier transport in AlGaN-based superlattice structures (2019)
  • Author(s): J. Yun and H. Hirayama
  • Organizer: The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
  • Int'l Joint Research
• [Presentation] Level broadening by dipole scattering in AlGaN/ AlGaN superlattice structures (2019)
  • Author(s): J. Yun and H. Hirayama
  • Organizer: Infrared Terahertz Quantum Workshop (ITQW 2019)
  • Int'l Joint Research
• [Presentation] Experimental and theoretical study of piezoelectric polarization in GaN/AlGaN terahertz quantum cascade lasers (2019)
  • Author(s): L. Wang, T. T. Lin, K. Wang, T. Grange and H. Hirayama
  • Organizer: Infrared Terahertz Quantum Workshop (ITQW 2019)
  • Int'l Joint Research
• [Presentation] MBE grown p-type AlGaN and deep ultraviolet light emitting diodes (2019)
  • Author(s): K. Wang, N. Maeda, M. A. Khan, Z. Li, Y. Wu, T. Tao, B. Liu, R. Zhang and H. Hirayama
  • Organizer: 4th International Workshop on Ultraviolet Materials and Devices (IWUMD4)
  • Int'l Joint Research
• [Presentation] Optimization of THz QCLs by suppressing A leakage current via high energy states (2019)
  • Author(s): T. T. Lin, K. Wang, L. Wang and H. Hirayama
  • Organizer: 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019)
  • Int'l Joint Research
• [Presentation] Progress on high output power THz QCLs developed by reducing horizontal parasitic current leakage (2019)
  • Author(s): T. T. Lin, K. Wang, L. Wang and H. Hirayama
  • Organizer: 電子情報通信学会 電子デバイス研究会
• [Presentation] Near- and far-infrared quantum cascasde lasers based on GaAs and GaN materials: devices design and MBE growth (2019)
  • Author(s): L. Wang, T. T. Lin, K. Wang and H. Hirayama
  • Organizer: 電子情報通信学会 電子デバイス研究会
• [Presentation] Recent progress of high output power THz QCLs by reducing parasitic leakage current (2019)
  • Author(s): T. T. Lin, L. Wang, K. Wang and H. Hirayama
  • Organizer: 理研シンポジウム第7 回「光量子工学研究」
• [Presentation] Gain predicted by NEGF method in terahertz quantum cascade lasers based on different semiconductors (2019)
  • Author(s): L. Wang, T. T. Lin, K. Wang and H. Hirayama
  • Organizer: 理研シンポジウム第7 回「光量子工学研究」
• [Presentation] Experimental and theoretical study of piezoelectric polarization in GaN/AlGaN terahertz quantum cascade lasers (2019)
  • Author(s): L. Wang, K. Wang, T. T. Lin and H. Hirayama
  • Organizer: 理研シンポジウム第7 回「光量子工学研究」
• [Presentation] GaN/AlGaN based THz-QCL taking into account an interface roughness scattering (2019)
  • Author(s): J. Yun and H. Hirayama
  • Organizer: 理研シンポジウム第7 回「光量子工学研究」
• [Presentation] Recent progression in strained GaN/AlGaN THz-QCLs, growth and fabrication (2019)
  • Author(s): L. Wang, T. T. Lin and H. Hirayama
  • Organizer: 東北大学＆理研第1回連携ワークショップ
• [Presentation] 0.45watt power GaAs-based THz QCL developed by reducing horizontal current leakage utilizing variable Al1-xGaxAs barriers-wells height structure (2019)
  • Author(s): T. T. Lin, L. Wang and H. Hirayama
  • Organizer: 東北大学＆理研第1回連携ワークショップ
• [Presentation] 0.44 watt power GaAs/AlGaAs THz QCL developed by reducing horizontal current leakage (2019)
  • Author(s): T. T. Lin, L. Wang and H. Hirayama
  • Organizer: 第80回応用物理学会秋季学術講演会
• [Presentation] Development of high-power THz-QCL by supressing regidual leakage current (2018)
  • Author(s): T. T. Lin, K. Wang, L. Wang, and H. Hirayama
  • Organizer: 19th East Asia Sub-millimeter-wave Receiver Technology Workshop and 5th RIKEN-NICT Joint Workshop on Terahertz Technology
• [Presentation] Recent progress towards realizing GaN/AlGaN quantum cascade lasers (2018)
  • Author(s): K. Wang, L. Wang, T. T. Lin, and H. Hirayama
  • Organizer: 電子情報通信学会レーザ・量子エレクトロニクス研究会（LQE）
• [Presentation] GaN系QCL実現に向けたSi基板上GaN/AlGaN超格子構造の作製 (2018)
  • Author(s): 藤川紗千恵，石黒稔也，王科，藤代博記，平山秀樹
  • Organizer: 理研シンポジウム 第6回「光量子工学研究」-サブ波長フォトニクス研究と新たな光量子工学の展開-
• [Presentation] Design of asymmetric two-wells indirect pumping terahertz quantum cascade lasers for high-temperature operation (2018)
  • Author(s): L. Wang, T. T. Lin, K. Wang, and H. Hirayama
  • Organizer: 理研シンポジウム 第6回「光量子工学研究」-サブ波長フォトニクス研究と新たな光量子工学の展開-
• [Presentation] Approach toward GaN-based terahertz quantum-cascade laser (2018)
  • Author(s): K. Wang, T. T. Lin, L. Wang, K. Fukuda, and H. Hirayama
  • Organizer: 理研シンポジウム 第6回「光量子工学研究」-サブ波長フォトニクス研究と新たな光量子工学の展開-
• [Presentation] Hybrid growth of AlGaN deep ultraviolet ligh emitting diodes by MBE and MOCVD (2018)
  • Author(s): K. Wang, N. Meda, and H. Hirayama
  • Organizer: The International Workshop on Nitride Semiconductors 2018 (IWN 2018)
  • Int'l Joint Research
• [Presentation] Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures (2018)
  • Author(s): K. Wang, T. T. Lin, L. Wang, J. Yun, W. Terashima, H. Hirayama, T. Grange, Z. Jehn, and S. Birnner
  • Organizer: The International Workshop on Nitride Semiconductors 2018 (IWN 2018)
  • Int'l Joint Research
• [Presentation] Optimization of terahertz quantum cascade lasers by suppressing a carrier leakage channel via a high energy state (2018)
  • Author(s): T. T. Lin, K. Wang, L. Wang and H. Hirayama
  • Organizer: International Conference on Photonics Research (ICPR 2018)
  • Int'l Joint Research / Invited
• [Presentation] Theoretical and experimental approaches for GaN/AlGaN Hz quantum cascade lasers (2018)
  • Author(s): K. Wang, L. Wang, T. T. Lin and H. Hirayama
  • Organizer: 日本学術振興会162委員会第110回研究会・特別公開シンポジウム
• [Presentation] Increased output power of THz-QCLs by reducing leakage current via upper levels (2018)
  • Author(s): T. T. Lin, K. Wang, L. Wang and H. Hirayama
  • Organizer: 第79回応用物理学会秋季学術講演会
• [Presentation] [Tutrial] Resent progress of THz-QCLs (2018)
  • Author(s): H. Hirayama
  • Organizer: International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2018)
  • Int'l Joint Research / Invited
• [Presentation] Broadening mechanisms and simulation for GaN based THz QCLs by non-equilibrium Green’s function method (2018)
  • Author(s): K. Wang, T. Grange, T. T. Lin, L. Wang, S. Birner, J. Yun, W. Terashima and H. Hirayama
  • Organizer: 8th International Quantum Cascade Laser School and Workshop (IQCLSW 2018)
  • Int'l Joint Research
• [Presentation] Improving the optical gain at high temperatue in THz-QCLs by using asymmetric two-wells scheme (2018)
  • Author(s): L. Wang, T. T. Lin, K. Wang and H. Hirayama
  • Organizer: 8th International Quantum Cascade Laser School and Workshop (IQCLSW 2018)
  • Int'l Joint Research
• [Presentation] Evaluation of GaN-based THz-QCL structure on Si substrate grown by MOCVD (2018)
  • Author(s): S. Fujikawa, T. Ishiguro, K. Wang, W. Terashima, H. Fujishiro and H. Hirayama
  • Organizer: The 19th International Conference on Metalorganic Vapor Phase Epitaxy (ICMOVPE-XIX)
  • Int'l Joint Research
• [Presentation] Simulation of optical gain for GAN terahertz quantum cascade lasers by using non-equilibrium green's function method (2018)
  • Author(s): K. Wang, T. T. Lin, L. Wang, J. Yun and H. Hirayama
  • Organizer: 第65回応用物理学会春季学術講演会
• [Presentation] New design of GaAs based THz-QCL for obtaining high optical gain by indirect-injecting asymmetric-wells superlattice structure (2018)
  • Author(s): L. Wang, T. T. Lin, K. Wang and H. Hirayama
  • Organizer: 第65回応用物理学会春季学術講演会
• [Presentation] 高出力THz-QCLの進展 (2017)
  • Author(s): 林宗澤，寺嶋亘，平山秀樹
  • Organizer: 第3回理研-NICT合同テラヘルツワークショップ/第17回ミリ波サブミリ波受信機ワークショップ
  • Place of Presentation: 情報通信研究機構（東京都小金井市）
  • Year and Date: 2017-02-27
• [Presentation] Current status and next challenges for GaN-based QCLs (2017)
  • Author(s): Ke Wang, W. Terashima, T. T. Lin and H. Hirayama
  • Organizer: 第3回理研-NICT合同テラヘルツワークショップ/第17回ミリ波サブミリ波受信機ワークショップ
  • Place of Presentation: 情報通信研究機構（東京都小金井市）
  • Year and Date: 2017-02-27
• [Presentation] テラヘルツ量子カスケードレーザの進展と展望 (2017)
  • Author(s): 平山秀樹、寺嶋亘、林宗澤
  • Organizer: レーザー学会
  • Place of Presentation: 徳島大学（徳島県徳島市）
  • Year and Date: 2017-01-07
  • Invited
• [Presentation] Current status and future of III-nitride ultraviolet and THz emitters (2017)
  • Author(s): H. Hirayama, M. Jo, W. Terashima, N. Maeda, T. T. Lin, and K. Wang
  • Organizer: 2017 International Conference on Solid State Devices and Materials (SSDM 2017)
  • Int'l Joint Research / Invited
• [Presentation] Design of THz QCLs toward high output power by variable height active structure near liquid nitrogen temperature operation (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: The 7th Annual World Congress of Nano Science and Technology-2017 (Nano S&T-2017)
  • Int'l Joint Research
• [Presentation] Nonradiative recombination centers in UV-LEDs reveled by below-gap excitation light at low current injection (2017)
  • Author(s): N. Kamata, K. Matsuda, T. Fukuda and Z. Honda
  • Organizer: The 11th Int. Symp. on Semiconductor Light Emitting Devices (ISSLED)
  • Int'l Joint Research
• [Presentation] Waveguide design for GaN/AlGaN terahertz quantum cascade lasers (2017)
  • Author(s): K. Wang, T. T. Lin, W. Terashima and H. Hirayama
  • Organizer: The 8th Asia-Pacific Workshop on Widegap Semiconductors (APWS2017)
  • Int'l Joint Research
• [Presentation] Design THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: 2017 International Conference on Solid State Devices and Materials (SSDM 2017)
  • Int'l Joint Research
• [Presentation] Waveguide design for GaN/AlGaN terahertz quantum cascade lasers (2017)
  • Author(s): K. Wang, T. T. Lin, W. Terashima and H. Hirayama
  • Organizer: 14th International Conference on Intersubband Transitions in Quantum Wells (ITQW2017)
  • Int'l Joint Research
• [Presentation] THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: 14th International Conference on Intersubband Transitions in Quantum Wells (ITQW2017)
  • Int'l Joint Research
• [Presentation] THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: The 24th Congress of the International Commission for Optics (ICO-24)
  • Int'l Joint Research
• [Presentation] Design of indirect injection scheme THz QCLs with high operation temperature (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: The 44th International Symposium on Compound Semiconductors (ISCS2017)
  • Int'l Joint Research
• [Presentation] Variable height active structure design THz QCLs operating at 3.7 THz with the maximum operation temperature 145 K (2017)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: The 44th International Symposium on Compound Semiconductors (ISCS2017)
  • Int'l Joint Research
• [Presentation] THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation with Dewar condenser (2017)
  • Author(s): T. T. Lin, W. Terashima and H. Hirayama
  • Organizer: The 44th International Symposium on Compound Semiconductors (ISCS2017)
  • Int'l Joint Research
• [Presentation] Recent progress of high-power THz-QCLs (2017)
  • Author(s): T. T. Lin, K. Wang, L. Wang, K. Fukuda and H. Hirayama
  • Organizer: 理研シンポジウム 第5回「光量子工学」
• [Presentation] THz-QCL designs for high-temperature operation far acrossing the KT limitation (2017)
  • Author(s): L. Wang, T. T. Lin, K. Wang and H. Hirayama
  • Organizer: 理研シンポジウム 第5回「光量子工学」
• [Presentation] Calculation of optical gain and design of low waveguide loss for GaN terahertz quantum cascade lasers (2017)
  • Author(s): K. Wang, T. T. Lin, L. Wang, J. Yun, W. Terashima and H. Hirayama
  • Organizer: 理研シンポジウム 第5回「光量子工学」
• [Presentation] Si基板上へのGaN系THz-QCL構造のMOCVD成長と評価 (2017)
  • Author(s): 石黒稔也，藤川紗千恵，王科，前田哲利，町田龍人，藤代博記，平山秀樹
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] aveguide design for GaN/AlGaN terahertz quantum cascade lasers (2017)
  • Author(s): K. Wang, T. T. Lin, W. Terashima and H. Hirayama
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] 250 mW output power operation of GaAs-based THz quantum cascade lasers (2017)
  • Author(s): T. T. Lin, W. Terashima and H. Hirayama
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] m面サファイア基板上半導性AlGaN/AlNの結晶成長と量子井戸発光特性 (2016)
  • Author(s): 大島一晟，定昌史，前田哲利，鎌田憲彦，平山秀樹
  • Organizer: 電子情報通信学会 レーザエレクトロニクス研究会
  • Place of Presentation: 京都大学桂キャンパス（京都府京都市）
  • Year and Date: 2016-12-13
• [Presentation] Future of III-Nitrides-Efficient UVC Emitter and Terahertz QCLs (2016)
  • Author(s): H. Hirayama
  • Organizer: Phtonics Conferense 2016
  • Place of Presentation: Phoenix Park, Korea.
  • Year and Date: 2016-11-30
  • Int'l Joint Research / Invited
• [Presentation] 半導体発光デバイス未踏領域の進展と展望 (2016)
  • Author(s): 平山秀樹
  • Organizer: 理研・分子研合同研究会 第13回エクストリーム・フォトニクス
  • Place of Presentation: ホテル竹島（愛知県蒲郡市）
  • Year and Date: 2016-11-14
  • Invited
• [Presentation] 高出力THz QCLの最近の進展 (2016)
  • Author(s): 林宗澤，寺嶋亘，平山秀樹
  • Organizer: 理研・分子研合同研究会 第13回エクストリーム・フォトニクス
  • Place of Presentation: ホテル竹島（愛知県蒲郡市）
  • Year and Date: 2016-11-14
• [Presentation] Recent progress of GaN-based terahertz quantum cascade lasers (2016)
  • Author(s): W. Terashima, T. T. Lin and Hideki Hirayama
  • Organizer: 5th Russia-Japan-USA-Europe Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies (RJUSE TeraTech-2016)
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2016-11-02
  • Int'l Joint Research / Invited
• [Presentation] 高出力（250mW）THz量子カスケードレーザーの進展 (2016)
  • Author(s): 林宗澤，平山 秀樹
  • Organizer: 第4回「光量子工学研究-若手・中堅研究者から見た光量子工学の展開-」
  • Place of Presentation: 理化学研究所（埼玉県和光市）
  • Year and Date: 2016-11-01
• [Presentation] 半極性AlN基板を用いた高効率LEDの開発 (2016)
  • Author(s): 大島一晟，定昌史，前田哲利，鎌田憲彦，平山秀樹
  • Organizer: 第4回「光量子工学研究-若手・中堅研究者から見た光量子工学の展開-」
  • Place of Presentation: 理化学研究所（埼玉県和光市）
  • Year and Date: 2016-11-01
• [Presentation] Current Status and Future of III-Nitride Ultraviolet and THz Emittres (2016)
  • Author(s): H. Hirayama
  • Organizer: International Workshop on Nitiride Semiconductors (IWN 2016)
  • Place of Presentation: Orland, USA.
  • Year and Date: 2016-10-02
  • Int'l Joint Research / Invited
• [Presentation] Growth of deep-UV (11-22) AlGaN quantum wells on m-plane (1-100) sapphire substrates (2016)
  • Author(s): T. Matsumoto, I. Oshima, N. Maeda, M. Jo, N. Kamata and H. Hirayama
  • Organizer: International Workshop on Nitride Semiconductors 2016 (IWN2016)
  • Place of Presentation: Orland, USA.
  • Year and Date: 2016-10-02
  • Int'l Joint Research
• [Presentation] Structural and electrical properties of semipolar (11-22) AlGaN grown on m-plane (1-100) sapphire substrates (2016)
  • Author(s): I. Oshima, T. Matsumoto, N. Maeda, M. Jo, N. Kamata and H. Hirayama
  • Organizer: International Workshop on Nitride Semiconductors 2016 (IWN2016)
  • Place of Presentation: Orland, USA.
  • Year and Date: 2016-10-02
  • Int'l Joint Research
• [Presentation] Improvement of AlN crystal quality on Si substrate for deep UV-LED Applications (2016)
  • Author(s): B. T. Tran, H. Hirayama, N. Maeda, M. Jo, D. Inoue and T. Kikitsu
  • Organizer: International Workshop on Nitride Semiconductors 2016 (IWN2016)
  • Place of Presentation: Orland, USA.
  • Year and Date: 2016-10-02
  • Int'l Joint Research
• [Presentation] THz quantum cascade laser toward high output power near liquid nitrogen temperature operation with dewar condenser (2016)
  • Author(s): T. Lin, W. Terashima and H. Hirayama
  • Organizer: The 41th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2016)
  • Place of Presentation: Copenhargen, Denmark.
  • Year and Date: 2016-09-25
  • Int'l Joint Research
• [Presentation] Realization of Unexplored Frequancy Terahertz Quantum Cascade Lasers by using III Nitride Semiconductors (2016)
  • Author(s): W. Terashima and H. Hirayama
  • Organizer: The 25th International Semiconductor Laser Conference (ISLC2016)
  • Place of Presentation: 神戸マリンパークオリエンタルホテル（兵庫県神戸市）
  • Year and Date: 2016-09-12
  • Int'l Joint Research
• [Presentation] Effect of patterned-Si substrate on crystalline quality of AlN template (2016)
  • Author(s): B. T. Tran, H. Hirayama, N. Maeda, M. Jo, D, Inoue and T. Kikitsu
  • Organizer: The 18th International Conference on Crystal Growth and Epitaxy (ICCGE18)
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2016-08-09
  • Int'l Joint Research
• [Presentation] Progress of high-power (250 mW) quantum cascade lasers (2016)
  • Author(s): Tsung-Tse Lin, Wataru Terashima and Hideki Hirayama
  • Organizer: RAPAC2016
  • Place of Presentation: ヒルトン東京（東京都新宿区）
  • Year and Date: 2016-08-02
• [Presentation] THz量子カスケードレーザの進展と展望 (2016)
  • Author(s): 平山秀樹
  • Organizer: 第140回微小光学研究会
  • Place of Presentation: 日本女子大学（東京都文京区）
  • Year and Date: 2016-07-19
  • Invited
• [Presentation] Fabrication of a-plane AlGaN quantum wells on r-plane sapphire (2016)
  • Author(s): M. Jo and H. Hirayama
  • Organizer: Compound Semiconductor Week 2016 (CSW2016)
  • Place of Presentation: とやま国際センター（富山県富山市）
  • Year and Date: 2016-06-28
  • Int'l Joint Research
• [Presentation] Progress of THz Quantum Cascade Laser using Nitride Semiconductor (2016)
  • Author(s): H. Hirayama, W. Terashima, S. Toyoda and N. Kamata
  • Organizer: 74th Device Research Conference (DRC 2016)
  • Place of Presentation: Newark, USA.
  • Year and Date: 2016-06-19
  • Int'l Joint Research / Invited
• [Presentation] テラヘルツ量子カスケードレーザの進展と今後の展望 (2016)
  • Author(s): 平山秀樹、寺嶋亘、林宗澤
  • Organizer: 応用物理学会・テラヘルツ電磁波技術究例会
  • Place of Presentation: 東京大学生産技術研究所（東京都目黒区）
  • Year and Date: 2016-06-16
  • Invited
• [Presentation] Modulation active structure design indirect injection sheme THz QCLs (2016)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: EMN Meeting on Terahertz 2016
  • Place of Presentation: San Sebastian, Spain.
  • Year and Date: 2016-05-16
  • Int'l Joint Research / Invited
• [Presentation] テラヘルツ量子カスケードレーザの最近の進展 (2016)
  • Author(s): 寺嶋亘、林宗澤、平山秀樹
  • Organizer: レーザーカオス研究会
  • Place of Presentation: おくとろ温泉やまのやど（和歌山県東牟婁郡）
  • Year and Date: 2016-05-13
  • Invited
• [Presentation] n-AlGaNバッファー層の2段化によるAlGaN 系DUV LEDの高効率化 (2016)
  • Author(s): 前田哲利、Tran Tinh、定昌史、平山秀樹
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-22
• [Presentation] 310nm帯紫外LED用Ga2O3 (-201)基板上AlGaN (0001)エピタキシャル膜の成長 (2016)
  • Author(s): 森島嘉克，平山秀樹，飯塚和幸，山崎進一，西村良男，山腰茂伸
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-21
• [Presentation] m面サファイア基板上半極性AlGaN/AlN層の結晶成長とドーピング及び量子井戸発光特性 (2016)
  • Author(s): 大島一晟，定昌史，前田哲利，鎌田憲彦，平山秀樹
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-21
• [Presentation] テラヘルツ量子カスケードレーザの進展と今後の展望 (2016)
  • Author(s): 平山秀樹，寺嶋亘，林宗澤
  • Organizer: 第63回応用物理学会春期学術講演会シンポジウム
  • Place of Presentation: 東京工業大学大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-21
  • Invited
• [Presentation] THz quantum cascade lasers toward high output power operation (2016)
  • Author(s): 林宗澤，寺嶋亘，平山秀樹
  • Organizer: 第63回応用物理学会春季学術講演会
  • Place of Presentation: 東京工業大学大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-20
• [Presentation] 半導体光デバイスの基礎と今後－青色LEDから深紫外LED、LD、QCLへ－ (2016)
  • Author(s): 平山秀樹
  • Organizer: 第63回応用物理学会春期学術講演会チュートリアル講演
  • Place of Presentation: 東京工業大学大岡山キャンパス（東京都目黒区）
  • Year and Date: 2016-03-19
  • Invited
• [Presentation] Recent Progress of AlGaN Deep-UV LEDs (2016)
  • Author(s): H. Hirayama, M. Jo, N. Maeda and N. Kamata
  • Organizer: IS-Plasma 2016 / IC-PLANTS2016
  • Place of Presentation: 名古屋大学東山キャンパス（名古屋市千種区）
  • Year and Date: 2016-03-08
  • Int'l Joint Research / Invited
• [Presentation] AlGaN系深紫外LEDの進展と展望 (2016)
  • Author(s): 平山秀樹
  • Organizer: 太陽紫外線防御研究委員会第26回シンポジウム
  • Place of Presentation: グランフロント大阪（大阪市北区）
  • Year and Date: 2016-03-04
  • Invited
• [Presentation] 化合物半導体を用いた未開拓波長光デバイス，深紫外LED及びTHz-QCLの開発 (2016)
  • Author(s): 平山秀樹
  • Organizer: 産総研シンポジウム
  • Place of Presentation: 秋葉原UDXカンファレンス（東京都千代田区）
  • Year and Date: 2016-02-19
  • Invited
• [Presentation] Progress of GaN/AlGaN THz-quantum cascade lasers (2016)
  • Author(s): H. Hirayama and W. Terashima
  • Organizer: 2016 SPIE Photonic West
  • Place of Presentation: San Francisco, U.S.A.
  • Year and Date: 2016-02-17
  • Int'l Joint Research / Invited
• [Presentation] 「未来の光」テラヘルツ光と未開拓領域テラヘルツ量子カスケードレーザの開発 (2015)
  • Author(s): 寺嶋亘
  • Organizer: 工学院大学年末講演会2015
  • Place of Presentation: 工学院大学（東京都新宿区）
  • Year and Date: 2015-12-26
  • Invited
• [Presentation] GaN系未開拓波長QCLの進展 (2015)
  • Author(s): 寺嶋亘，平山秀樹
  • Organizer: 電子情報通信学会電子デバイス研究会
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2015-12-21
• [Presentation] The improvement of output power characteristics of THz QCLs in 77 K Dewar condenser (2015)
  • Author(s): 林宗澤，寺嶋亘，平山秀樹
  • Organizer: 電子情報通信学会電子デバイス研究会
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2015-12-21
• [Presentation] Precise growth control for AlGaN/GaN Superlattices by MBE and MOCVD for developing GaN-based THz quantum cascade lasers (2015)
  • Author(s): W. Terashima and H. Hirayama
  • Organizer: EMN 3CG
  • Place of Presentation: Hong Kong, China
  • Year and Date: 2015-12-15
  • Int'l Joint Research / Invited
• [Presentation] Development of GaN/AlGaN based terahertz quantum cascade lasers (2015)
  • Author(s): W. Terashima
  • Organizer: EMN Hong Kong Meeting
  • Place of Presentation: Hong Kong, China
  • Year and Date: 2015-12-10
  • Int'l Joint Research / Invited
• [Presentation] テラヘルツ量子カスケードレーザの進展と今後の展望 (2015)
  • Author(s): 平山秀樹
  • Organizer: 量子現象利用デバイス技術分科会
  • Place of Presentation: 電子情報技術産業協会会議室（東京都千代田区）
  • Year and Date: 2015-12-07
  • Invited
• [Presentation] GaN系THz-QCLの最近の進展 (2015)
  • Author(s): 寺嶋亘，平山秀樹
  • Organizer: 電子情報通信学会レーザ・量子エレクトロニクス研究会
  • Place of Presentation: 大阪市立大学（大阪府大阪市）
  • Year and Date: 2015-11-27
• [Presentation] 無極性a面AlGaN/AlNの高温成長と深紫外発光特性 (2015)
  • Author(s): 定昌史，平山秀樹
  • Organizer: 電子情報通信学会レーザ・量子エレクトロニクス研究会
  • Place of Presentation: 大阪市立大学（大阪府大阪市）
  • Year and Date: 2015-11-27
• [Presentation] m面サファイア上AlGaN/AlNの結晶成長と光学特性 (2015)
  • Author(s): 大島一晟，定昌史，前田哲利，鎌田憲彦，平山秀樹
  • Organizer: 電子情報通信学会レーザ・量子エレクトロニクス研究会
  • Place of Presentation: 大阪市立大学（大阪府大阪市）
  • Year and Date: 2015-11-27
• [Presentation] Indirect injection scheme THz QCLs with high operation temperature (2015)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: EMN meeting on Vacuum Electronics
  • Place of Presentation: Las Vegas, U.S.A.
  • Year and Date: 2015-11-22
  • Int'l Joint Research / Invited
• [Presentation] 殺菌用深紫外LEDの進展と今後の展望 (2015)
  • Author(s): 平山秀樹
  • Organizer: 光とレーザーの科学技術フェア
  • Place of Presentation: 科学技術館（東京都千代田区）
  • Year and Date: 2015-11-19
  • Invited
• [Presentation] 接注入機構を用いたTHz QCL高温動作の進展 (2015)
  • Author(s): 林宗澤，平山秀樹
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
  • Invited
• [Presentation] GaN系THz-QCLの最近の進展 (2015)
  • Author(s): 寺嶋亘，平山秀樹
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
• [Presentation] 無極性a面AlNの高温成長と深紫外LEDへの応用 (2015)
  • Author(s): 定昌史，平山秀樹
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
• [Presentation] p型AlGaN透明コンタクト層を用いた深紫外LEDの注入機構最適設計 (2015)
  • Author(s): 定昌史，平山秀樹
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
• [Presentation] Development of high-quality AlN crystals on patterned Si substrates for deep-UV LEDs (2015)
  • Author(s): B. T. Tran, N. Maeda and H. Hirayama
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
• [Presentation] 無極性m面サファイア上AlGaN/AlNの結晶成長と深紫外発行特性 (2015)
  • Author(s): 大島一晟，定昌史，前田哲利，鎌田憲彦，平山秀樹
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
• [Presentation] サファイア加工基板上AlNの結晶成長とそれを用いた深紫外LEDの実現 (2015)
  • Author(s): 金沢裕也，松本卓磨，鎌田憲彦，前田哲利，定昌史，平山秀樹
  • Organizer: 理研シンポジウム第3回「光量子工学研究」
  • Place of Presentation: 理化学研究所和光地区（埼玉県和光市）
  • Year and Date: 2015-11-12
• [Presentation] Terahertz quantum-cascade laser based on III-nitride semiconductors (2015)
  • Author(s): H. Hirayama and W. Terashima, S. Toyoda and N. Kamata
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-12
  • Int'l Joint Research / Invited
• [Presentation] High-quality AlN template for deep-UV LEDs grown on facet controlled patterned sapphire substrate (FC-PSS) (2015)
  • Author(s): Y. Kanazawa, H. Hirayama, N. Maeda, M. Jo, N. Kamata, Y. Kashima, E. Matsuura, S. Shimatani, M. Kokubo, T. Tashiro, T. Ohkawa, R. Kamimura and Y. Osada
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-11
  • Int'l Joint Research
• [Presentation] Growth and optical properties of semi-polar AlN/AlGaN layers grown on m-plane sapphire substrates (2015)
  • Author(s): I. Ohshima, M. Jo, N. Maeda, N. Kamata and H. Hirayama
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-11
  • Int'l Joint Research
• [Presentation] Growth of non-polar a-plane AlN on r-plane sapphire (2015)
  • Author(s): M. Jo and H. Hirayama
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-11
  • Int'l Joint Research
• [Presentation] Growth of AlN template and AlGaN MQWs on micro-circle patterned Si substrate (2015)
  • Author(s): B. T. Tran, H. Hirayama, N. Maeda and M. Jo
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-11
  • Int'l Joint Research
• [Presentation] Up to 40 K lasing operation of 5.7 THz GaN/AlGaN quantum cascade laser (2015)
  • Author(s): W. Terashima and H. Hirayama
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-10
  • Int'l Joint Research
• [Presentation] Fabrication of a 260-nm light-emitting diode with a transparent p-AlGaN layer (2015)
  • Author(s): M. Jo, N. Maeda and H. Hirayama
  • Organizer: ISGN-6
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-11-10
  • Int'l Joint Research
• [Presentation] Development of unexplored frequency semiconductor light sources; deep-UV LEDs and THz-QCLs (2015)
  • Author(s): H. Hirayama
  • Organizer: WPI-AIMR
  • Place of Presentation: 東北大学（宮城県仙台市）
  • Year and Date: 2015-10-30
  • Int'l Joint Research / Invited
• [Presentation] 未踏波長半導体デバイス－深紫外LEDとTHz-QCLの進展－ (2015)
  • Author(s): 平山秀樹
  • Organizer: 電気学会パワー光源産業技術調査専門委員会研究会
  • Place of Presentation: 自動車会館（東京都千代田区）
  • Year and Date: 2015-10-16
  • Invited
• [Presentation] THz quantum cascade lasers using nitride semiconductors (2015)
  • Author(s): H. Hirayama, W. Terashima, S. Toyoda and N. Kamata
  • Organizer: VI Workshop on Physics and Technologies of Semiconductor Lasers
  • Place of Presentation: Krakow, Poland
  • Year and Date: 2015-10-12
  • Int'l Joint Research / Invited
• [Presentation] Recent progress and future prospects of AlGaN deep-UV LEDs (2015)
  • Author(s): H. Hirayama
  • Organizer: ISOM’15
  • Place of Presentation: 富山国際会議場（富山県富山市）
  • Year and Date: 2015-10-05
  • Int'l Joint Research / Invited
• [Presentation] Growth and Optical Properties of AlN/AlGaN Heterostructures on Patterned Si Substrate (2015)
  • Author(s): T. Tran，前田哲利，定昌史，平山秀樹
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-16
• [Presentation] GaN/AlGaN系量子カスケードレーザの5.76THz，40Kにおける動作 (2015)
  • Author(s): 寺嶋亘，平山秀樹
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-15
• [Presentation] モジュレーションバリア構造を用いた3.7THz 145K量子カスケードレーザ (2015)
  • Author(s): 林宗澤，平山秀樹
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-15
• [Presentation] r面サファイアを用いたa面AlNの高温成長 (2015)
  • Author(s): 定昌史，平山秀樹
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] ファセット表面加工基板上に成長した深紫外LED 用高品質AlN テンプレート (2015)
  • Author(s): 金沢裕也，平山秀樹，前田哲利，定昌史，鎌田憲彦，鹿嶋行雄，松浦恵里子，嶋谷聡，小久保光典，田代貴晴，大川貴史，上村隆一郎，長田大和
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] m 面サファイア基板上半極性AlN/AlGaN 層の結晶成長と光学特性 (2015)
  • Author(s): 大島一晟，定昌史，前田哲利，鎌田憲彦，平山秀樹
  • Organizer: 第76回応用物理学会秋季学術講演会
  • Place of Presentation: 名古屋国際会議場（愛知県名古屋市）
  • Year and Date: 2015-09-13
• [Presentation] Modulation barrier design AlxGa1-xAs/GaAs terahertz quantum cascade lasers (2015)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: ITQW2015
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2015-09-08
  • Int'l Joint Research
• [Presentation] Progress of THz quantum cascade laser using nitride semiconductors (2015)
  • Author(s): H. Hirayama and W. Terashima
  • Organizer: ICNS-11
  • Place of Presentation: Beijing, China
  • Year and Date: 2015-09-02
  • Int'l Joint Research / Invited
• [Presentation] AlGaAs/GaAs quantum cascade lasers with modulation Al composition barriers design lasing at 3.7 THz, 145 K (2015)
  • Author(s): T. T. Lin and H. Hirayama
  • Organizer: FTT2015
  • Place of Presentation: アクトシティ浜松（静岡県浜松市）
  • Year and Date: 2015-09-01
  • Int'l Joint Research
• [Presentation] AlGaN窒化物半導体の結晶品質向上とデバイス化技術，深紫外LEDの応用展開 (2015)
  • Author(s): 平山秀樹
  • Organizer: サイエンス＆テクノロジー社セミナー
  • Place of Presentation: 大井町きゅりあん（東京都品川区）
  • Year and Date: 2015-08-27
  • Invited
• [Presentation] Direct growth of thick AlN template on micro-circle patterned-Si substrate (2015)
  • Author(s): B. T. Tran, H. Hirayama, N. Maeda, M. Jo, and S. Toyoda
  • Organizer: CLEO Pacific Rim 2015
  • Place of Presentation: Busan, Korea
  • Year and Date: 2015-08-26
  • Int'l Joint Research
• [Presentation] テラヘルツ量子カスケードレーザの最近の進展 (2015)
  • Author(s): 林宗澤，寺嶋亘，平山 秀樹
  • Organizer: 平成27年電気学会電子・情報・システム部門大会
  • Place of Presentation: 長崎大学（長崎県長崎市）
  • Year and Date: 2015-08-26
• [Presentation] Direct growth and controlled coalescence of thick AlN template on circle patterned-Si substrate (2015)
  • Author(s): B. T. Tran, H. Hirayama, S. Toyoda and N. Maeda
  • Organizer: SPIE Optics + Photonics 2015
  • Place of Presentation: San Diego, U.S.A.
  • Year and Date: 2015-08-12
  • Int'l Joint Research
• [Presentation] Recent progress of THz-QCLs using nitride-based semiconductors (2015)
  • Author(s): H. Hirayama and W. Terashima
  • Organizer: SPIE Optics + Photonics 2015
  • Place of Presentation: San Diego, U.S.A.
  • Year and Date: 2015-08-09
  • Int'l Joint Research / Invited
• [Presentation] 踏波長光デバイスを目指して－深紫外LEDとテラヘルツQCLの開発－ (2015)
  • Author(s): 平山秀樹
  • Organizer: 第38回光通信研究会
  • Place of Presentation: 人材開発センター富士Calm（山梨県富士吉田市）
  • Year and Date: 2015-08-08
  • Invited
• [Presentation] 「未来の光」深紫外線、テラヘルツ光の魅力 (2015)
  • Author(s): 平山秀樹
  • Organizer: 理研仙台一般公開セミナー
  • Place of Presentation: 理化学研究所仙台地区（宮城県仙台市）
  • Year and Date: 2015-08-01
  • Invited
• [Presentation] 未踏の光テラヘルツの地形を拓く－テラヘルツ量子カスケードレーザの開発－ (2015)
  • Author(s): 平山秀樹
  • Organizer: 平成27年度「理研と親しむ会」第23回講演会
  • Place of Presentation: 理化学研究所仙台地区（宮城県仙台市）
  • Year and Date: 2015-07-27
  • Invited
• [Presentation] 窒化物を用いた未開拓領域光デバイスの展望 (2015)
  • Author(s): 平山秀樹
  • Organizer: 第34回電子材料シンポジウム
  • Place of Presentation: ラフォーレ琵琶湖（滋賀県守山市）
  • Year and Date: 2015-07-15
  • Invited
• [Presentation] Recent progress AlGaN deep-UV LEDs by improving light-extraction efficiency (2015)
  • Author(s): H. Hirayama
  • Organizer: 2015 IEEE Photonics Society Summer Topical Meeting Series
  • Place of Presentation: Nassau, Bahamas
  • Year and Date: 2015-07-13
  • Int'l Joint Research / Invited
• [Presentation] 「未来の光」深紫外線，テラヘルツ光の魅力 (2015)
  • Author(s): 平山秀樹
  • Organizer: 三鷹ネットワーク大学講座
  • Place of Presentation: 三鷹ネットワーク大学（東京都三鷹市）
  • Year and Date: 2015-06-18
  • Invited
• [Presentation] AlGaN系深紫外LED高効率化の進展と展望 (2015)
  • Author(s): 平山秀樹，前田哲利，定昌史，鎌田憲彦
  • Organizer: 第143回結晶工学分科会研究会
  • Place of Presentation: 東京都市大学（東京都世田谷区）
  • Year and Date: 2015-06-05
  • Invited
• [Book] SEMICONDUCTORS AND SEMIMETALS [III-Nitride Semiconductor Optoelectronics] (2017)
  • Author(s): H. Hirayama
  • Total Pages: 474
  • Publisher: Elsevier
• [Book] III-Nitride Ultraviolet Emitters -Technology and Applications- (2015)
  • Author(s): H. Hirayama
  • Publisher: Springer Series in Material Science
• [Remarks] テラヘルツ量子素子研究チーム
  • URL: http://www2.riken.jp/lab/THz-device/
• [Remarks]
  • URL: http://www2.riken.jp/lab/THz-device/
• [Remarks]
  • URL: http://www.riken.jp/lab/THz-device/
• [Remarks] 平山量子光素子研究室
  • URL: http://www.riken.jp/lab/optodevice/index.html
• [Patent(Industrial Property Rights)] 量子カスケードレーザー素子 (2018)
  • Inventor(s): 王利，林宗澤，平山秀樹
  • Industrial Property Rights Holder: 王利，林宗澤，平山秀樹
  • Industrial Property Rights Type: 特許
  • Filing Date: 2018
• [Patent(Industrial Property Rights)] 窒化物半導体量子カスケードレーザー (2015)
  • Inventor(s): 平山秀樹，寺嶋亘
  • Industrial Property Rights Holder: 平山秀樹，寺嶋亘
  • Industrial Property Rights Type: 特許
  • Filing Date: 2015-07-28
• [Patent(Industrial Property Rights)] 窒化物半導体量子カスケードレーザー (2015)
  • Inventor(s): 平山秀樹，寺嶋亘
  • Industrial Property Rights Holder: 平山秀樹，寺嶋亘
  • Industrial Property Rights Type: 特許
  • Filing Date: 2015-08-11
  • Overseas
• [Patent(Industrial Property Rights)] 窒化物半導体量子カスケードレーザー (2015)
  • Inventor(s): 平山秀樹，寺嶋亘
  • Industrial Property Rights Holder: 平山秀樹，寺嶋亘
  • Industrial Property Rights Type: 特許
  • Filing Date: 2015-08-11
  • Overseas