Two-mode quantum dot laser for terahertz generation

• Project/Area Number: 15K04710
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: National Institute of Information and Communications Technology
• Principal Investigator: Akahane Kouichi 国立研究開発法人情報通信研究機構, ネットワークシステム研究所ネットワーク基盤研究室, 主任研究員 (50359072)
• Co-Investigator(Kenkyū-buntansha): 川西 哲也 早稲田大学, 理工学術院, 教授 (40359063)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 量子ドット / 2波長レーザ / テラヘルツ波 / 歪保障 / 歪補償 / 外部キャビティ

Outline of Final Research Achievements

In this study, we fabricated two-mode laser using semiconductor InAs quantum dots as the gain medium in the external cavity configuration. When the QDs were used for gain media, the mode hopping could be suppressed and stable two-mode lasing was obtained. Two-mode laser emission with a separation of 0.09, 0.1, 0.3, and 1 THz has been achieved by controlling the etalon and narrow-band filter setting and corresponding beat signal was observed in interference measurement. From these results, the fabricated two-mode laser can be used for generation of terahertz wave.

Research Products

• [Journal Article] Anomalous optical diffraction by a phase grating induced by a local eld effect in semiconductor quantum dots (2017)
  • Author(s): Yasuyoshi Mitsumori, Tetsuya Watanuki, Yuki Sato, Keiichi Edamatsu, Kouichi Akahane, Naokatsu Yamamoto
  • Journal Title: Physical Review B Volume: 95 Pages: 155301-155301
  • Peer Reviewed
• [Journal Article] Molecular beam epitaxy of strained-layer InAs/GaInSb superlattices for long-wavelength photodetectors (2017)
  • Author(s): Mikhail Patrashin, Kouichi Akahane, Norihiko Sekine, Iwao Hosako
  • Journal Title: Journal of Crystal Growth Volume: 477 Pages: 86-90
  • Peer Reviewed
• [Journal Article] Control of wavelength and decay time of photoluminescence for InAs quantum dots grown on InP(311)B using the digital embedding method (2016)
  • Author(s): Kouichi Akahane, Naokatsu Yamamoto, Toshimasa Umezawa, Tetsuya Kawanishi, Takehiro Tanaka, Shin-Ichi Nakamura, Hideyuki Sotobayashi
  • Journal Title: Physica Status Solidi B Volume: 253 Pages: 640-643
  • Peer Reviewed
• [Journal Article] Characteristics of highly stacked InAs quantum-dot laser grown on vicinal (001)InP substrate (2016)
  • Author(s): Kouichi Akahane, Toshimasa Umezawa, Atsushi Matsumoto, Naokatsu Yamamoto, Tetsuya Kawanishi
  • Journal Title: Japanese Journal of Applied Physics Volume: 55
  • NAID: 210000146379
  • Peer Reviewed
• [Journal Article] Increase in the emission wavelength (over 1800nm) of InAs quantum dots grown on InP substrates using a dot-in-well structure (2016)
  • Author(s): Kouichi Akahane, Atsushi Matsumoto, Toshimasa Umezawa, Naokatsu Yamamoto, Keita Hashimoto, Hiroshi Takai
  • Journal Title: Physica Status Solidi B Volume: 254 Pages: 1600490-1600490
  • Peer Reviewed
• [Journal Article] Fabrication of InAs quantum dot stacked structure on InP(311)B substrate by digital embedding method (2015)
  • Author(s): Kouichi Akahane, Naokatsu Yamamoto, Tetsuya Kawanishi
  • Journal Title: Journal of Crystal Growth Volume: 432 Pages: 15-18
  • Peer Reviewed
• [Presentation] Fabrication of Highly Stacked Self-assembled InAs Quantum Dot with Strain-compensation Technique (2017)
  • Author(s): Kouichi Akahane
  • Organizer: 3rd Annual World Congress of Smart Materials 2017
  • Place of Presentation: AVANI Riverside Bangkok Hotel (Bangkok, Thailand)
  • Year and Date: 2017-03-18
  • Int'l Joint Research / Invited
• [Presentation] Differential Frequency Tunable Dual-Mode Heterogeneous QD Laser with Si PIC (2017)
  • Author(s): Atsushi Matsumoto, Toshimasa Umezawa, Kouichi Akahane, Naokatsu Yamamoto, Hirohito Yamada, Tomohiro Kita
  • Organizer: Conference on Lasers and Electro-Optics 2017 (CLEO2017)
  • Int'l Joint Research
• [Presentation] Evaluation of Multi-channel Amplification for Highly Stacked Quantum Dot Semiconductor Optical Amplifiers (2017)
  • Author(s): Kouichi Akahane,, Naoya Yoshida, Yu Fukae, Atsushi Matsumoto, Toshimasa Umezawa, Atsushi Kanno, Hideyuki Sotobayashi, Naokatsu Yamamoto
  • Organizer: Progress In Electromagnetics Research Symposium 2017 (PIERS 2017 St Petersburg)
  • Int'l Joint Research
• [Presentation] Extreme Thermal Stability Of 1550 nm Band Highly Stacked QD-LDs With P-Doped Structure (2017)
  • Author(s): Atsushi Matsumoto, Kouichi Akahane, Toshimasa Umezawa, Naokatsu Yamamoto
  • Organizer: Conference on Lasers and Electro-Optics Pacific Rim 2017 (CLEO PR 2017)
  • Int'l Joint Research
• [Presentation] Mode separation control of few-mode quantum dot lasers by using a multistep etalon filter (2017)
  • Author(s): Kouichi Akahane, Masaki Inui, Ryuji Sakamoto, Shingo Nakane, Masaru Iwao, Toshimasa Umezawa, Atsushi Matsumoto, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi, Hideyuki Sotobayashi
  • Organizer: 42nd International Conference on Infrared, Millimeter and Terahertz Wave 2017 (IRMMW-THz 2017)
  • Int'l Joint Research
• [Presentation] Carrier dynamics of InAs quantum dot with digital embedding method grown on InP(311)B substrate (2017)
  • Author(s): Kouichi Akahane
  • Organizer: 6th International Workshop Epitaxial Growth and Fundamental Properties of Semiconductor Nanostructures (SemiconNano2017)
  • Int'l Joint Research / Invited
• [Presentation] High Characteristic Temperature for Ridge-waveguide Laser with a Highly Stacked InAs Quantum Dot Structure (2016)
  • Author(s): Kouichi Akahane, Atsushi Matsumoto, Toshimasa Umezawa, Naokatsu Yamamoto, Tetsuya Kawanishi
  • Organizer: The 25th International Semiconductor Laser Conference (ISLC2016)
  • Place of Presentation: Kobe Meriken Park Hotel (Kobe, Hyogo)
  • Year and Date: 2016-09-14
  • Int'l Joint Research
• [Presentation] Increasing the emission wavelength of InAs quantum dot grown on InP substrates using a dot in well structure (2016)
  • Author(s): Kouichi Akahane, Atsushi Matsumoto, Toshimasa Umezawa, Naokatsu Yamamoto, Keita Hashimoto, Hiroshi Takai
  • Organizer: Compound Semiconductor Week 2016 (CSW2016)
  • Place of Presentation: Toyama International Conference Center (富山市、富山県)
  • Year and Date: 2016-06-28
  • Int'l Joint Research
• [Presentation] 複屈折エタロンフィルタによる2波長レーザの周波数間隔変化 (2016)
  • Author(s): 乾 勝貴, 赤羽 浩一, 菅野 敦史, 山本 直克, 川西 哲也, 外林 秀之
  • Organizer: 電子情報通信学会OPE研究会
  • Place of Presentation: 機械振興会館（東京都、港区）
  • Year and Date: 2016-06-17
• [Presentation] Temperature dependence of photoluminescence from InAs quantum dot grown by digital embedding on InP(311)B substrates (2016)
  • Author(s): Kouichi Akahane, Toshimasa Umezawa, Atsushi Matsumoto, Naokatsu Yamamoto
  • Organizer: 7th International Conference on Optical, Optoelectronic and Photonic Materials and Applications (ICOOPMA2016)
  • Place of Presentation: Polytechniquue Montreal (Montreal, Canada)
  • Year and Date: 2016-06-16
  • Int'l Joint Research
• [Presentation] 方解石エタロンフィルタによる2波長レーザの周波数間隔変化 (2016)
  • Author(s): 乾 勝貴、赤羽 浩一、山本 直克、菅野 敦史、川西 哲也、外林 秀之
  • 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、目黒区、東京都
  • Year and Date: 2016-03-19
• [Presentation] Wavelength tunability of a two-mode semiconductor quantum dot laser in the telecom band (2016)
  • Author(s): Kouichi Akahane, Toshimasa Umezawa, Atsushi Kanno, Atsushi Matsumoto, Naokatsu Yamamoto, Tetsuya Kawanishi
  • Organizer: Photonics West 2016
  • Place of Presentation: San Francisco, California, USA
  • Year and Date: 2016-02-13
  • Int'l Joint Research
• [Presentation] Characteristics of Highly Stacked InAs Quantum-dot Laser Grown on Vicinal (001)InP Substrate (2015)
  • Author(s): Kouichi Akahane, Naokatsu Yamamoto, Toshimasa Umezawa, Atsushi Matsumoto, Tetsuya Kawanishi
  • Organizer: SSDM2015
  • Place of Presentation: Sapporo Convention Center, Sapporo, Hokkaido
  • Year and Date: 2015-09-27
  • Int'l Joint Research
• [Presentation] Control of Energy State of InAs Quantum Dot by Digital Embedding Method on InP(311)B Substrate (2015)
  • Author(s): Kouichi Akahane
  • Organizer: SemiconNano2015
  • Place of Presentation: Hsinchu, Taiwan
  • Year and Date: 2015-09-06
  • Int'l Joint Research / Invited
• [Presentation] Change of Mode Separation for Two-mode Laser with Semiconductor Quantum Dots (2015)
  • Author(s): Kouichi Akahane, Naokatsu Yamamoto, Atsushi Kanno, Toshimasa Umezawa, Tetsuya Kawanishi
  • Organizer: Progress in Electromagnetics Research Symposium
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 2015-07-06
  • Int'l Joint Research