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Proceedings Paper

Ultra-fast and ultra-small photonic crystal/quantum dot all-optical switch for future photonic networks
Author(s): Hitoshi Nakamura; Yoshimasa Sugimoto; Kyozo Kanamoto; Naoki Ikeda; Yu Tanaka; Yusui Nakamura; Shunsuke Ohkouchi; Kuon Inoue; Hiroshi Ishikawa; Kiyoshi Asakawa
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Paper Abstract

We demonstrated a novel two-dimensional photonic crystal (PC) based Symmetric-Mach-Zehnder-type all-optical switch (PC-SMZ) with InAs quantum dots (QDs) acting as a nonlinear phase-shift source. The 600-μm-long PC-SMZ with integrated wavelength-selective PC-based directional couplers and other PC components exhibited a 15-ps-wide switching-window with a 2-ps rise/fall time at a wavelength of 1.3μm. Nonlinear optical phase shift in the 500-μm-long straight PC waveguide was also achieved at sufficiently low optical-energy (e.g., π phase shift at ~100-fJ control-pulse energy) due to the small saturation energy density of the QDs, which was enhanced in the PC waveguide, without having to use conventional measures such as SOAs with current-injected gain. These results pave the way to achieving novel PC- and QD-based photonic integrated circuits including multiple PC-SMZs and other novel functional devices.

Paper Details

Date Published: 16 September 2005
PDF: 13 pages
Proc. SPIE 5926, Tuning the Optical Response of Photonic Bandgap Structures II, 59260B (16 September 2005); doi: 10.1117/12.619928
Show Author Affiliations
Hitoshi Nakamura, The Femtosecond Technology Research Association (Japan)
Hitachi Ltd. (Japan)
Yoshimasa Sugimoto, The Femtosecond Technology Research Association (Japan)
Kyozo Kanamoto, The Femtosecond Technology Research Association (Japan)
Mitsubishi Electric Co. (Japan)
Naoki Ikeda, The Femtosecond Technology Research Association (Japan)
Yu Tanaka, The Femtosecond Technology Research Association (Japan)
Yusui Nakamura, Femtosecond Technology Research Association (Japan)
Kumamoto Univ. (Japan)
Shunsuke Ohkouchi, The Femtosecond Technology Research Association (Japan)
Kuon Inoue, Chitose Institute of Science and Technology (Japan)
Hiroshi Ishikawa, Femtosecond Technology Research Association (Japan)
National Institute of Advanced Industrial Science and Technology (Japan)
Kiyoshi Asakawa, Femtosecond Technology Research Association (Japan)
Univ. of Tsukuba (Japan)


Published in SPIE Proceedings Vol. 5926:
Tuning the Optical Response of Photonic Bandgap Structures II
Philippe M. Fauchet; Paul V. Braun, Editor(s)

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