Acceleration of carrier-relaxation time in QDs embedded in a photonic crystal waveguide due to the Purcell effect

2010 Fiscal Year Final Research Report

• Project/Area Number: 21760034
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: Wakayama University
• Principal Investigator: OZAKI Nobuhiko Wakayama University, システム工学部, 准教授 (30344873)
• Project Period (FY): 2009 – 2010
• Keywords: フォトニック結晶 / 量子ドット

Research Abstract

We have proposed to control a carrier relaxation time in self-assembled quantum dots (QDs) embedded in a photonic crystal waveguide (PC-WG) by using the Purcell effect. Resonance of a high photon density-of-states region in the PC-WG mode with the electron transition energy in the QD will increase the spontaneous emission rate and the carrier relaxation time can be shortened. To verify the resonance effect, QDs embedded in PC-WGs with various lattice constants were fabricated and pump-probe measurements were performed. As a result, we found that the relaxation time was shortened when the high photon DOS region resonated with the ES emission wavelength of the QD.

Research Products

• [Journal Article] Wideband Operation of 2D Photonic Crystal Directional Coupler with Topology Optimized Waveguide Bends (2010)
  • Author(s): Yoshinori Watanabe, Naoki Ikeda, Yoshiaki Takata, Yoshinori Kitagawa, Nobuhiko Ozaki, Yoshimasa Sugimoto, Kiyoshi Asakawa
  • Journal Title: Journal of Nonlinear Optical Physics & Materials vol.19 Pages: 543-550
  • Peer Reviewed
• [Journal Article] Sequential Operations of Quantum Dot/Photonic Crystal All-optical Switch with High Repetitive Frequency Pumping (2009)
  • Author(s): Yoshinori Kitagawa, Nobuhiko Ozaki, Yoshiaki Takata, Naoki Ikeda, Yoshinori Watanabe, Yoshimasa Sugimoto, Kiyoshi Asakawa
  • Journal Title: J.Lightwave Technol. vol.27 Pages: 1241-1247
  • Peer Reviewed
• [Journal Article] Monolithic Fabrication of Two-Color InAs QDs for Integrated Optical Devices by Using a Rotational Metal Mask (2009)
  • Author(s): Nobuhiko Ozaki, Shunsuke Ohkouchi, Yoshiaki Takata, Naoki Ikeda, Yoshinori Watanabe, Yoshimasa Sugimoto, Kiyoshi Asakawa
  • Journal Title: Jpn.J.Appl.Phys.(065502) vol.48 Pages: 1-4
  • Peer Reviewed
• [Journal Article] Advanced quantum dot and photonic crystal technologies for integrated nanophotonic circuits (2009)
  • Author(s): Y.Sugimoto, N.Ikeda, N.Ozaki, Y.Watanabe, S.Ohkouchi, T.Kuroda, T.Mano, T.Ochiai, K.Kuroda, N.Koguchi, K.Sakoda, K.Asakawa
  • Journal Title: Microelectronics Journal vol.40 Pages: 736-740
  • Peer Reviewed
• [Presentation] フォトニック結晶導波路に埋込んだ量子ドットにおける光励起とキャリア緩和過程制御 (2010)
  • Author(s): 尾崎信彦, 宗石達矢, 北川嘉則, 池田直樹, 杉本喜正, 浅川潔
  • Organizer: 応用物理学会励起ナノプロセス研究会第六回研究会
  • Place of Presentation: ビッグ・アイ国際障害者交流センター(堺市)
  • Year and Date: 2010-11-02
• [Presentation] Evolution of Nanophotonics from Semiconductor Photonic Crystal Device to Metal/Semiconductor Plasmonic Device (2010)
  • Author(s): K.Asakawa, Y.Sugimoto, Y.Watanabe, N.Ikeda, N.Ozaki, D.Kumar V, T.Nomura, D.Inoue, A.Miura, H.Fujikawa, K.Sato
  • Organizer: 5^<th> Int.Conf.Advanced Optoelectronics and Lasers (CAOL 2010)
  • Place of Presentation: Sevastopol, Crimea, Ukraine.
  • Year and Date: 2010-09-11
• [Presentation] Fabrication and characterization of an all-optical flip-flop based on photonic crystal waveguides and two-color quantum dots (2010)
  • Author(s): N.Ozaki, Y.Takata, Y.Kitagawa, N.Ikeda, S.Nakamura, S.Ohkouchi, A.Watanabe, Y.Watanabe, Y.Sugimoto, K.Asakawa
  • Organizer: OSA Int.Conf.Nanophotonics 2010
  • Place of Presentation: Tsukuba, Japan.
  • Year and Date: 2010-06-01
• [Book] "Ch.9 Photonic crystal all-optical switches" of "Optical switches -Materials and design-" (2010)
  • Author(s): K.Asakawa, Y.Sugimoto, N.Ikeda, Y.Watanabe, N.Ozaki, Y.Takata, Y.Kitagawa, S.Ohkouchi, S.Nakamura, A.Watanabe, X.Wang
  • Total Pages: 241-275
  • Publisher: Woodhead Publishing Limited