Ultra-fast and ultra-small photonic crystal/quantum dot all-optical switch for future photonic networks

Hitoshi Nakamura; Yoshimasa Sugimoto; Kyozo Kanamoto; Naoki Ikeda; Yu Tanaka; Yusui Nakamura; Shunsuke Ohkouchi; Kuon Inoue; Hiroshi Ishikawa; Kiyoshi Asakawa

doi:10.1117/12.619928

16 September 2005 Ultra-fast and ultra-small photonic crystal/quantum dot all-optical switch for future photonic networks

Hitoshi Nakamura, Yoshimasa Sugimoto, Kyozo Kanamoto, Naoki Ikeda, Yu Tanaka, Yusui Nakamura, Shunsuke Ohkouchi, Kuon Inoue, Hiroshi Ishikawa, Kiyoshi Asakawa

Author Affiliations +

Proceedings Volume 5926, Tuning the Optical Response of Photonic Bandgap Structures II; 59260B (2005) https://doi.org/10.1117/12.619928
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

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.

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Hitoshi Nakamura, Yoshimasa Sugimoto, Kyozo Kanamoto, Naoki Ikeda, Yu Tanaka, Yusui Nakamura, Shunsuke Ohkouchi, Kuon Inoue, Hiroshi Ishikawa, and Kiyoshi Asakawa "Ultra-fast and ultra-small photonic crystal/quantum dot all-optical switch for future photonic networks", Proc. SPIE 5926, Tuning the Optical Response of Photonic Bandgap Structures II, 59260B (16 September 2005); https://doi.org/10.1117/12.619928

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