25 March 2004 Nanotechnologies of photonic crystals and quantum dots for ultrasmall and ultrafast all-optical switches
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We have fabricated several two-dimensional photonic-crystal (2DPC) slab waveguides by using fine EB lithography and dry etching. The 2DPC waveguides include straight, bend and directional coupler on the GaAs/AlGaAs substrate as an application to the ultra-small and ultra-fast all-optical switching device (PC-SMZ). Site-controlled InAs quantum dots (QDs) responsible for nonlinear phase shift in the PC-SMZ have been investigated by developing a nano-probe assisted in-situ process. Optical linear and nonlinear properties of stacked QDs were characterized. The result exhibited the π/2 phase shift required for the SMZ-type optical switching operation. These results are capable of achieving the PC-SMZ.
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Kiyoshi Asakawa, Kiyoshi Asakawa, Yoshimasa Sugimoto, Yoshimasa Sugimoto, H. Nakamura, H. Nakamura, Naoki Ikeda, Naoki Ikeda, Y. Tanaka, Y. Tanaka, Y. Nakamura, Y. Nakamura, S. Ohkouchi, S. Ohkouchi, Kozyo Kanamoto, Kozyo Kanamoto, Hiroshi Ishikawa, Hiroshi Ishikawa, Y. Watanabe, Y. Watanabe, K. Inoue, K. Inoue, H. Sasaki, H. Sasaki, Koji Ishida, Koji Ishida, } "Nanotechnologies of photonic crystals and quantum dots for ultrasmall and ultrafast all-optical switches", Proc. SPIE 5277, Photonics: Design, Technology, and Packaging, (25 March 2004); doi: 10.1117/12.531187; https://doi.org/10.1117/12.531187

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