Control of germanium light emission using nanobeam-type optical nanocavity and a challenge for lasing action

• Project/Area Number: 24686043
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: The University of Tokyo
• Principal Investigator: Iwamoto Satoshi 東京大学, 生産技術研究所, 准教授 (40359667)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000); Fiscal Year 2014: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2013: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000); Fiscal Year 2012: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
• Keywords: フォトニック結晶 / ナノ共振器 / ゲルマニウム / ナノビーム共振器 / 歪制御 / 微小電気機械システム

Outline of Final Research Achievements

We fabricated germanium photonic crystal (PhC) nanobeam cavities and observed enhanced photoluminescence at the cavity resonances at room temperature. We achieve the cavity Qs of 1,350 and 1,850 for a L3-type and a lattice-modulated PhC nanobeam cavities, respectively. We also numerically demonstrated that a strong uniaxial tensile strain in an air-suspended germanium PhC nanobem cavity by combining the effects of a strained SiN film deposited on the top and of the pad structures that support the nanobeam. The induced strain reduces the energy difference between the conduction band minima of germanium at the G and L points inside the cavity region, where strong light-matter interaction is expected to take place.

Research Products

• [Journal Article] Suspended germanium cross-shaped microstructures for enhancing biaxial tensile strain (2016)
  • Author(s): Satomi Ishida, Satoshi Kako, Katsuya Oda, Tatemi Ido, Satoshi Iwamoto, and Yasuhiko Arakawa
  • Journal Title: Jpn. J. Appl. Phys. Volume: 55 Issue: 4S Pages: 04EH14-04EH14
  • DOI: 10.7567/jjap.55.04eh14
  • NAID: 210000146361
• [Journal Article] Electro-Mechanical Q Factor Control of Photonic Crystal Nanobeam Cavity (2013)
  • Author(s): 太田竜一、太田泰友、都木宏之、熊谷直人、田辺克明、石田悟己、岩本敏、荒川泰彦
  • Journal Title: Japanese Journal of Applied Physics Volume: 52 Issue: 4S Pages: 04CG01-04CG01
  • DOI: 10.7567/jjap.52.04cg01
  • Peer Reviewed
• [Presentation] Germanium Photonic Crystal Nanobeam Cavity with Q > 1,300 (2015)
  • Author(s): M. Kuroki, S. Kako, S. Ishida, K. Oda, T. Ido, S. Iwamoto, and Y. Arakawa
  • Organizer: The Conference on Lasers and Electro-Optics and The Quantum Electronics and Laser Science Conference (CLEO/QELS 2015), SM3G.4
  • Place of Presentation: San Jose, California, USA
  • Year and Date: 2015-05-11 – 2015-05-15
• [Presentation] Germanium Photonic Crystal Nanobeam Cavity with Q >1,300 (2015)
  • Author(s): M. Kuroki, S. Kako, S. Ishida, K. Oda, T. Ido, S. Iwamoto, and Y. Arakawa
  • Organizer: Conference on Lasers and Electro-Optics (CLEO 2015)
  • Place of Presentation: San Jose, California, USA
  • Year and Date: 2015-05-11
  • Int'l Joint Research
• [Presentation] L3 型Ge フォトニック結晶ナノビーム共振器における共振器モード(Q>1,300)の観測 (2015)
  • Author(s): 黒木理宏，加古敏，石田悟己，小田克矢，井戸立身，岩本敏，荒川泰彦
  • Organizer: 第62回応用物理学会春季学術講演会, 13a-A10-7
  • Place of Presentation: 東海大学湘南キャンパス, 平塚, 神奈川
  • Year and Date: 2015-03-13
• [Presentation] Fabrication and optical characterization of germanium L3-type photonic crystal nanobeam cavity (2014)
  • Author(s): M. Kuroki, S. Kako, S. Ishida, K. Oda, T. Ido, S. Iwamoto and Y. Arakawa
  • Organizer: The 4th International Symposium on Photonics and Electronics Convergence – Advanced Nanophotonics and Silicon Device Systems, P-24
  • Place of Presentation: 東京大学
  • Year and Date: 2014-11-17 – 2014-11-19
• [Presentation] ゲルマニウムフォトニック結晶ナノビーム共振器の作製と光学評価 (2014)
  • Author(s): 黒木理宏，加古敏，石田悟己，小田克矢，井戸立身，岩本敏，荒川泰彦
  • Organizer: 第75回応用物理学会学術講演会,17p-C8-2
  • Place of Presentation: 北海道大学札幌キャンパス
  • Year and Date: 2014-09-17
• [Presentation] 窒化シリコン膜を用いた高歪ゲルマニウムフォトニック結晶ナノビーム共振器の設計 (2014)
  • Author(s): 黒木理宏, 加古敏, 岩本敏, 荒川泰彦
  • Organizer: 第61回応用物理学会春季学術講演会 17p-E16-6
  • Place of Presentation: 青山学院大学, 相模原, 神奈川
  • Year and Date: 2014-03-17
• [Presentation] Silicon Light Emitting Diodes with Photonic Crystal Nanocavities (2013)
  • Author(s): S. Iwamoto, S. Nakayama, S. Ishida and Y. Arakawa
  • Organizer: The 3rd International Symposium on Photonics and Electronics Convergence
  • Place of Presentation: 東京大学、東京
  • Year and Date: 2013-11-18 – 2013-11-20
• [Presentation] MEMSを用いた広範囲Q値可変フォトニック結晶ナノビーム共振器の実現 (2013)
  • Author(s): 太田竜一
  • Organizer: 第60回応用物理学会春季学術講演会
  • Place of Presentation: 神奈川工科大学
  • Year and Date: 2013-03-29