Science of local optical-to-terahertz wave conversion in low dimensional nanomaterials

• Project/Area Number: 18KK0140
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: Osaka University
• Principal Investigator: Tonouchi Masayoshi 大阪大学, レーザー科学研究所, 教授 (40207593)
• Co-Investigator(Kenkyū-buntansha): 芹田 和則 大阪大学, レーザー科学研究所, その他 (00748014) ; 村上 博成 大阪大学, レーザー科学研究所, 准教授 (30219901)
• Project Period (FY): 2018-10-09 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000); Fiscal Year 2020: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000); Fiscal Year 2019: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000); Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
• Keywords: テラヘルツ波 / ナノカーボン / フェムト秒パルスレーザー / 励起子 / 2次元原子層物質

Outline of Final Research Achievements

We have developed an optical switch using semiconducting carbon nanotubes (CNTs), successfully observed terahertz waves with their femtosecond laser excitation, and combined it with non-equilibrium numerical simulations to elucidate the exciton divergence dynamics from its properties, and the extent of the CNT arrangement makes a significant contribution to the excited quasiparticle dynamics, such as the bypassing of its thermalization pathway, was clarified.
We also observed and elucidated complex ultrafast dynamics in GaInN/GaN multilayer quantum well structures and bismuth telluride/telluride heterojunctions by terahertz emission spectroscopy.
In addition, anisotropic photophysical properties of photo-charges in the surface nano-region of gallium oxide were also clarified.

Academic Significance and Societal Importance of the Research Achievements

カーボンナノチューブ（CNT）など低次元ナノ材料の物性は、その構造に由来する特異な素励起に起因する電気的・光学的特性を有しており、これらを活用した新規な機能を持つ次世代デバイスの基礎研究に向けて、光励起電荷ダイナミクスの解明は不可欠である。しかし、従来のフォトルミネッセンスなどでは、光励起の初期過程におけるキャリア・励起子の発生・走行・解離プロセスなどサブピコ秒レベルの高速な電荷走行現象を捉えることは困難であった。本研究では、高速電荷ダイナミクスをテラヘルツ波放射分光により解明することで、テラヘルツ放射科学を世界に展開する波及効果をもたらし、ナノデバイス開発に新たな道を提供するものとなった。

Research Products

• [Int'l Joint Research] Rice University/University of Utah(米国)
• [Int'l Joint Research] University of Warsaw/ENSEMBLE(ポーランド)
• [Int'l Joint Research] Nanyang Technological University(シンガポール)
• [Int'l Joint Research] TU Wien(オーストリア)
• [Int'l Joint Research] Bielefeld University/Technical University Braunschweig(ドイツ)
• [Int'l Joint Research] Rice University(米国)
• [Int'l Joint Research] Rice University(米国)
• [Int'l Joint Research] Bielefeld University(ドイツ)
• [Int'l Joint Research] Nanyang Technological University(シンガポール)
• [Int'l Joint Research] ライス大学(米国)
• [Int'l Joint Research] ライス大学(米国)
• [Int'l Joint Research] 南洋理工大学(シンガポール)
• [Journal Article] Probing photocarrier dynamics in a Bi₂Te₃?Te eutectic p?n junction with a laser terahertz emission microscope (2023)
  • Author(s): Murakami Fumikazu、Serita Kazunori、Kawayama Iwao、Murakami Hironaru、Bandopadhyay Kingshuk、Materna Andrzej、Urbas Augustine M.、Pawlak Dorota A.、Tonouchi Masayoshi
  • Journal Title: APL Materials Volume: 11 Issue: 3 Pages: 031102-031102
  • DOI: 10.1063/5.0137862
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] The 2023 terahertz science and technology roadmap (2023)
  • Author(s): Leitenstorfer Alfred、Moskalenko Andrey S、Kampfrath Tobias、Kono Junichiro、Castro-Camus Enrique、Peng Kun、Qureshi Naser、Turchinovich Dmitry、Tanaka Koichiro, others
  • Journal Title: Journal of Physics D: Applied Physics Volume: 56 Issue: 22 Pages: 223001-223001
  • DOI: 10.1088/1361-6463/acbe4c
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Transition from Diffusive to Superdiffusive Transport in Carbon Nanotube Networks via Nematic Order Control (2023)
  • Author(s): Michael Wais, Filchito Renee G. Bagsican, Natsumi Komatsu, Weilu Gao, Kazunori Serita, Hironaru Murakami, Karsten Held, Iwao Kawayama, Junichiro Kono, Marco Battiato, and Masayoshi Tonouchi
  • Journal Title: Nano Letters Volume: In press Issue: 10 Pages: 4448-4455
  • DOI: 10.1021/acs.nanolett.3c00765
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Non-Drude-Type Response of Photocarriers in Fe-Doped β-Ga2O3 Crystal (2022)
  • Author(s): Jiang Hao、Wang Ke、Murakami Hironaru、Tonouchi Masayoshi
  • Journal Title: Photonics Volume: 9 Issue: 4 Pages: 233-233
  • DOI: 10.3390/photonics9040233
  • Peer Reviewed / Open Access
• [Journal Article] 半導体R＆D支援テラヘルツ放射顕微鏡 (2022)
  • Author(s): 斗内政吉
  • Journal Title: テラヘルツ波産業創成の課題と展望（シーエムシー出版） Volume: 7章
• [Journal Article] Ultrafast Terahertz Nanoseismology of GaInN/GaN Multiple Quantum Wells (2021)
  • Author(s): Mannan Abdul、Bagsican Filchito Renee G.、Yamahara Kota、Kawayama Iwao、Murakami Hironaru、Bremers Heiko、Rossow Uwe、Hangleiter Andreas、Turchinovich Dmitry、Tonouchi Masayoshi
  • Journal Title: Advanced Optical Materials Volume: n/a Issue: 15 Pages: 2100258-2100258
  • DOI: 10.1002/adom.202100258
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A better understanding of terahertz emission from semiconductor surfaces with a phased-array effect (2021)
  • Author(s): Mannan Abdul、Inoue Ryotaro、Murakami Fumikazu、Serita Kazunori、Murakami Hironaru、Tonouchi Masayoshi
  • Journal Title: AIP Advances Volume: 11 Issue: 12 Pages: 125021-125021
  • DOI: 10.1063/5.0077054
  • Peer Reviewed / Open Access
• [Journal Article] Terahertz emission spectroscopy of GaN-based heterostructures (2021)
  • Author(s): Mannan Abdul、Yamahara Kota、Bagsican Filchito Renee G.、Serita Kazunori、Murakami Hironaru、Kawayama Iwao、Higashiwaki Masataka、Tonouchi Masayoshi
  • Journal Title: Journal of Applied Physics Volume: 129 Issue: 24 Pages: 245702-245702
  • DOI: 10.1063/5.0047402
  • Peer Reviewed / Open Access
• [Journal Article] Terahertz Excitonics in Carbon Nanotubes: Exciton Autoionization and Multiplication (2020)
  • Author(s): Filchito Renee G. Bagsican, Michael Wais, Natsumi Komatsu, Weilu Gao, Lincoln W. Weber, Kazunori Serita, Hironaru Murakami, Karsten Held, Frank A. Hegmann, Masayoshi Tonouchi, Junichiro Kono, Iwao Kawayama, Marco Battiato
  • Journal Title: Nano Lett. 2020 Volume: 20 Issue: 1 Pages: 3098-3105
  • DOI: 10.1038/srep09681
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Simplified formulas for the generation of terahertz waves from semiconductor surfaces excited with a femtosecond laser (2020)
  • Author(s): M. Tonouchi
  • Journal Title: Journal of Applied Physics Volume: 127 Issue: 24 Pages: 245703-245703
  • DOI: 10.1063/5.0005623
  • Peer Reviewed / Open Access
• [Journal Article] Terahertz Emission Spectroscopy and Microscopy on Ultrawide Bandgap Semiconductor -Ga2O3 (2020)
  • Author(s): Hao Jiang, Chen Gong, Tatsuhiko Nishimura, Hironaru Murakami, Iwao Kawayama, Hidetoshi Nakanishi and Masayoshi Tonouchi
  • Journal Title: Photonics Volume: 7 Issue: 3 Pages: 73-73
  • DOI: 10.3390/photonics7030073
  • Peer Reviewed / Open Access
• [Journal Article] Low-temperature GaAs-based plasmonic photoconductive terahertz detector with Au nano-islands (2020)
  • Author(s): Hironaru Murakami, Tomoya Takarada, and Masayoshi Tonouchi
  • Journal Title: Photonics Research Volume: 8 Issue: 9 Pages: 1448-1456
  • DOI: 10.1364/prj.395517
  • Peer Reviewed / Open Access
• [Journal Article] Terahertz Excitonics in Carbon Nanotubes: Exciton Autoionization and Multiplication (2020)
  • Author(s): Filchito Renee G. Bagsican, Michael Wais, Natsumi Komatsu, Weilu Gao, Lincoln W. Weber, Kazunori Serita, Hironaru Murakami, Karsten Held, Frank A. Hegmann, Masayoshi Tonouchi, Junichiro Kono, Iwao Kawayama, and Marco Battiato
  • Journal Title: Nano Lett. 2020 Volume: 20,05 Issue: 5 Pages: 3098-3105
  • DOI: 10.1021/acs.nanolett.9b05082
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Insight into fundamental quantum properties of THz emission from GaN-based MQWs and phased-array effect using LTEM (2022)
  • Author(s): Abdul Mannan
  • Organizer: International Workshop on Terahertz Nanoscience
  • Int'l Joint Research
• [Presentation] Past, Present, and Future of LTEM: Laser Terahertz Emission Microscope (2022)
  • Author(s): Masayoshi Tonouchi
  • Organizer: IEEE Summer Topicals Meeting Series 2022
  • Int'l Joint Research / Invited
• [Presentation] Laser Terahertz Emission Microscopy for Silicon Electronics (2022)
  • Author(s): Masayoshi Tonouchi
  • Organizer: SPIE Optical Engineering + Applications
  • Int'l Joint Research / Invited
• [Presentation] Effects of hydrogen dissociation in semi-insulating gallium nitride under UV irradiation on terahertz emission properties (2022)
  • Author(s): Fumikazu Murakami, Abdul Mannan, Kazunori Serita, Hironaru Murakami, Masayoshi Tonouchi
  • Organizer: 47th International Conference on Infrared, Millimeter and Terahertz Waves 2022
  • Int'l Joint Research
• [Presentation] A study of phased-array effect in THz radiation pattern from semiconductor surface (2022)
  • Author(s): A. Mannan, K. Serita, H. Murakami, and M. Tonouchi
  • Organizer: 47th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2022)
  • Int'l Joint Research
• [Presentation] Interfacial electric field and bandgap estimation on GaN:Eu using laser terahertz emission microscopy (2022)
  • Author(s): Fumikazu Murakami、Atsushi Takeo、Abdul Mannan、Yasufumi Fujiwara、Masayoshi Tonouchi
  • Organizer: 第83回応用物理学会秋季学術講演会
• [Presentation] GaN:Eu/GaN超格子構造におけるPLおよびTHz波放射特性の温度依存性 (2022)
  • Author(s): 村上史和、竹尾敦志、Abdul Mannan、藤原康文、斗内政吉
  • Organizer: 第21回低温工学・超電導若手合同講演会
• [Presentation] レーザーテラへルツ放射顕微鏡によるGaN:Euのバンドギャップ推定とキャリア輸送特性評価 (2022)
  • Author(s): 村上史和、竹尾敦志、Abdul Mannan、藤原康文、斗内政吉
  • Organizer: 電子情報通信学会 電子デバイス研究会/マイクロ波テラヘルツ光電子技術研究会
• [Presentation] レーザーテラヘルツエミッション顕微鏡によるワイドギャップ半導体の評価 (2022)
  • Author(s): 斗内政吉
  • Organizer: レーザー学会 学術講演会第42回年次大会
• [Presentation] ナノ開口付きカンチレバーチップと近接場THz検出器によるレーザーテラヘルツ放射顕微鏡の開発 (2022)
  • Author(s): 李 治賢, 芹田 和則, 村上 博成, 斗内 政吉
  • Organizer: 第69回応用物理学会春季学術講演会
• [Presentation] 半絶縁性窒化ガリウムからのテラヘルツ波放射特性とUV照射による水素脱離 (2022)
  • Author(s): 村上史和, Abdul Mannan, 芹田和則, 村上博成, 斗内政吉
  • Organizer: 第69回応用物理学会春季学術講演会
• [Presentation] Emission Spectroscopy of Wide Gap Semiconductors (2021)
  • Author(s): Masayoshi Tonouchi
  • Organizer: The 2021 Spring Meeting of the European Materials Research Society , VIRTUAL Conference
  • Int'l Joint Research / Invited
• [Presentation] Laser Terahertz Emission Microscope as a Killer Tool (2021)
  • Author(s): Masayoshi Tonouchi
  • Organizer: The International Conference on Infrared, Millimeter, and Terahertz Waves 2021
  • Int'l Joint Research / Invited
• [Presentation] Effect Of CW Laser Illumination On Fe-doped β-Ga2O3 (2021)
  • Author(s): Wang Ke, Jiang Hao, Gong Chen, Murakami Fumikazu, Serita Kazunori, Murakami Hironaru, Tonouchi Masayoshi
  • Organizer: The International Conference on Infrared, Millimeter, and Terahertz Waves 2021
  • Int'l Joint Research
• [Presentation] Effect Of CW Laser Illumination On Fe-doped β-Ga2O3 (2021)
  • Author(s): H. Murakami, M. Tonouchi, K. Konishi, K. Ota
  • Organizer: The International Conference on Infrared, Millimeter, and Terahertz Waves 2021
  • Int'l Joint Research
• [Presentation] Visualization of phase array effect in a terahertz radiation pattern from the semiconductor surface in free space (2021)
  • Author(s): Mannan, F. Murakami, K. Serita, H. Murakami, M. Tonouchi
  • Organizer: JSAP-OSA Joint Symposia 2021
  • Int'l Joint Research
• [Presentation] Terahertz(THz) radiation mechanism from a metal-insulator-semiconductor structure upon femtosecond laser illumination (2021)
  • Author(s): Dongxun Yang, Masayoshi Tonouchi
  • Organizer: JSAP-OSA Joint Symposia 2021
  • Int'l Joint Research
• [Presentation] Temperature dependence of anisotropic terahertz conductivity of unintentionally doped β-gallium oxide (2021)
  • Author(s): Ke Wang, Hao Jiang, Hironaru Murakami, and Masayoshi Tonouchi
  • Organizer: JSAP-OSA Joint Symposia 2021
  • Int'l Joint Research
• [Presentation] Multi-Functional Optical Responses of InGaN/GaN Multiple Quantum Wells studied by Laser Terahertz Emission Microscopy (2021)
  • Author(s): Masayoshi Tonouchi
  • Organizer: International Symposium on Imaging
  • Int'l Joint Research / Invited
• [Presentation] How to use terahertz emission spectroscopy and imaging in real onsite semiconductor R&D scenes (2021)
  • Author(s): Masayoshi Tonouchi
  • Organizer: Smart NanoMaterials 2021
  • Int'l Joint Research / Invited
• [Presentation] Nano-seismology on GaInN/GaN MQWs sandwiched in GaN medium by LTEM (2021)
  • Author(s): A. Mannan, H. Murakami, A. Hangleiter, D. Turchinovich, Masayoshi Tonouchi
  • Organizer: The 9th Russia-Japan-USA-Europe Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies
  • Int'l Joint Research / Invited
• [Presentation] erahertz Spectroscopy on b-Ga2O3 (2021)
  • Author(s): Masayoshi Tonouchi
  • Organizer: International Conference on “Frontiers in Terahertz Technologies and Applications
  • Int'l Joint Research / Invited
• [Presentation] 半導体R＆D支援分析技術としてのテラヘルツ放射顕微鏡 (2021)
  • Author(s): 斗内政吉
  • Organizer: 川崎市 ナノマイクロ技術支援講座【講師】
• [Presentation] GaInN／GaN 多層量子井戸構造からの多機能光励起テラヘルツ波放射 (2021)
  • Author(s): Mannan, F. R. G. Bagsican, 山原滉太, 川山巌, 村上博成, H. Bremers, U. Rossow, A. Hangleiter, D. Turchinovich, 斗内政吉
  • Organizer: 電子情報通信学会 テラヘルツ応用システム研究会
• [Presentation] Broad-band Terahertz Birefringence of Fe-doped Gallium Oxide (Ga2O3) (2020)
  • Author(s): Wang Ke, Hao Jiang, Chen Gong, Hironaru Murakami and Masayoshi Tonouchi
  • Organizer: 第68回応用物理学会春季学術講演会
• [Presentation] Self-induced nonlinearity modulates the THz waveform generated by the two-color laser filament (2020)
  • Author(s): Chen Gong, Takahiro Teramoto, and Masayoshi Tonouchi
  • Organizer: 第68回応用物理学会春季学術講演会
• [Presentation] Terahertz emission from GaInN/GaN multiple quantum wells studied by wavelength-tunable terahertz emission spectroscopy (2020)
  • Author(s): Abdul Mannan, Filchito Renee G. Bagsican, Kota Yamahara, Iwao Kawayama, Hironaru Murakami, Heiko Bremers, Uwe Rossow, Andreas Hangleiter, Dmitry Turchinovich, Masayoshi Tonouchi
  • Organizer: 第68回応用物理学会春季学術講演会
• [Presentation] Contact-free THz nano-seismology in InGaN/GaN Multiple Quantum Wells (2019)
  • Author(s): Abdul Mannan, I. Kawayama, K. Yamahara, F.R. Bagsican, H. Murakami, T. Langer, H. Bremers, U.Rossow, D. Turchinovich, A. Hangleiter, and M. Tonouchi
  • Organizer: Global Nonophotonics 2019
  • Int'l Joint Research
• [Presentation] Near surface built-in field of wide gap semiconductors studied by LTEM (2019)
  • Author(s): Masayoshi Tonouchi
  • Organizer: Global Nonophotonics 2019
  • Int'l Joint Research / Invited
• [Presentation] Plasmonic enhancement effects on terahertz detection sensitivity of LT-GaAs photoconductive antenna deposited with gold nanoparticles (2019)
  • Author(s): H.Murakami, T.Takarada, M.Tonouchi
  • Organizer: OptoX-Nano2019
  • Int'l Joint Research / Invited
• [Presentation] Frequency tunable narrow band terahertz time-domain source (2019)
  • Author(s): Masayoshi Tonouchi
  • Organizer: Asian Symposium on Intense Laser Science11
  • Int'l Joint Research / Invited
• [Presentation] Probing photocarrier dyamics in semiconducting carbon nanotubes by terahertz emission spectroscopy (2019)
  • Author(s): Filchito Renee G. Bagsican, Iwao Kawayama, Michael Wais, Natsumi Komatsu, Kazunori Serita, Weilu Gao, Lincoln Weber, Marco Battiato, Hironaru Murakami, Frank A. Hegmann, Junichiro Kono, and Masayoshi Tonouchi
  • Organizer: 2019 International Conference on Advanced Functional Materials and Nanotechnology
  • Int'l Joint Research / Invited
• [Presentation] Terahertz science and technology: exploring the last frontier of the electromagnetic spectrum (2019)
  • Author(s): Filchito Renee G. Bagsican, Iwao Kawayama, Hironaru Murakami, and Masayoshi Tonouchi
  • Organizer: 21st SPVM National Physics Conference
  • Int'l Joint Research
• [Presentation] Opto-science and engineering using nanomaterials for fundamentals and applications (2019)
  • Author(s): Masayoshi Tonouchi
  • Organizer: The 3rd IMS-INSD Joint Workshop on Frontier Nanomaterials
  • Int'l Joint Research / Invited
• [Presentation] Laser Terahertz Emission Microscope for Real World Application (2019)
  • Author(s): Masayoshi Tonouchi
  • Organizer: The 5th International Symposium on Microwave/THz Science and Applications 2019
  • Int'l Joint Research / Invited
• [Presentation] Terahertz radiation generated by acoustic wavesin InGaN/GaN Multiple Quantum Wells (2019)
  • Author(s): Abdul Mannan, I. Kawayama, K. Yamahara, F.R. Bagsican, H. Murakami, A. Hangleiter, T. Langer, H. Bremers, U. Rossow, D. Turchinovich, M. Tonouchi.
  • Organizer: The 80th JSAP Autumn Meeting 2019 JSAP-OSA Joint Symposia
  • Int'l Joint Research
• [Presentation] Observation of Bi2Te3/Te striped structures using a laser terahertz emission microscope (2019)
  • Author(s): F. Murakami, K. Serita, H. Murakami, R. Dalipi, A. M. Urbas, A. Materna, M. Buza, D. A. Pawlak, M. Tonouchi, and I. Kawayama
  • Organizer: 44th International Conference on Infrared, Millimeter, and Terahertz Waves
  • Int'l Joint Research
• [Presentation] Terahertz Nanoscience (2019)
  • Author(s): Masayoshi Tonouchi
  • Organizer: 2019 2nd International Conference on Nano Science&Technology
  • Int'l Joint Research / Invited
• [Presentation] Laser terahertz emission microscope for real world application (2019)
  • Author(s): Masayoshi Tonouchi
  • Organizer: SPIE The international society for optica and photonics
  • Int'l Joint Research / Invited
• [Presentation] Terahertz Emission from a Photoconductive Antenna Switch Based on Aligned Single-Chirality Semiconducting Carbon Nanotubes (2019)
  • Author(s): Filchito Renee G. Bagsican, Iwao Kawayama, Michael Wais, Natsumi Komatsu, Kazunori Serita, Weilu Gao, Lincoln Weber, Marco Battiato, Hironaru Murakami, Frank A. Hegmann, Junichiro Kono, and Masayoshi Tonouchi
  • Organizer: 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures
  • Int'l Joint Research
• [Presentation] Characteristics of THz emissions from Bi2Te3/Te striped structure (2019)
  • Author(s): F. Murakami, K. Serita, H. Murakami, R. Dalipi, A. M. Urbas, A. Materna, M. Buza, D. A. Pawlak, M. Tonouchi, and I. Kawayama
  • Organizer: 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures
  • Int'l Joint Research
• [Presentation] Terahertz radiation from InGaN/GaN Multiple Quantum Wells (2019)
  • Author(s): Abdul Mannan, I. Kawayama, K. Yamahara, F.R. Bagsican, H. Murakami, T. Langer, H. Bremers, U. Rossow, D. Turchinovich, A. Hangleiter, and M. Tonouchi
  • Organizer: 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures
  • Int'l Joint Research
• [Presentation] フェムト秒レーザー励起したBi2Te3/Teストライプ構造か ら放射されるテラヘルツ波偏光特性 (2019)
  • Author(s): 村上史和、芹田和則、村上博成、Dalipi Rea、Urbas. A.、Materna. A.、Buza. M.、Pawlak. D.、斗内政吉、川山巌
  • Organizer: 第80回応用物理学会秋季学術講演会
• [Presentation] Terahertz emission from photoconductive antenna switches based on highly-aligned and chirality-enriched semiconducting carbon nanotubes (2019)
  • Author(s): Filchito Renee G. Bagsican, Iwao Kawayama, Michael Wais, Natsumi Komatsu, Kazunori Serita, Weilu Gao, Lincoln Weber, Marco Battiato, Hironaru Murakami, Frank A. Hegmann, Junichiro Kono, and Masayoshi Tonouchi,
  • Organizer: Optical Terahertz Science and Technology2019
  • Int'l Joint Research
• [Presentation] Terahertz emission properties of photoconductive antennas based on semiconducting carbon nanotubes (2018)
  • Author(s): Filchito Renee Bagsican, Iwao Kawayama, Kazunori Serita, Weilu Gao, Natsumi Komatsu, Michael Wais, Lincoln Weber, Marco Battiato, Hironaru Murakami, Frank A. Hegmann, Junichiro Kono, and Masayoshi Tonouchi
  • Organizer: The Global Nanophotonics 2018
  • Int'l Joint Research
• [Presentation] New Methods of THz Time Domain Spectroscopy for Graphene Science (2018)
  • Author(s): Masayoshi Tonouchi
  • Organizer: International Conference on Nanomaterials & Nanotechnology 2018
  • Int'l Joint Research / Invited
• [Book] テラヘルツ時間領域分光 (2021)
  • Author(s): 斗内政吉
  • Total Pages: 256
  • Publisher: 内田老鶴圃
  • ISBN: 9784753623181
• [Funded Workshop] The international workshop on Terahertz Nanoscience (2022)