SOI-based photonic crystal line-defect waveguides

Koji Yamada; Masaya Notomi; Akihiko Shinya; Itaru Yokohama; Tetsufumi Shoji; Tai Tsuchizawa; Toshifumi Watanabe; Jun-Ichi Takahashi; Emi Tamechika; Hirofumi Morita

doi:10.1117/12.475545

11 July 2002 SOI-based photonic crystal line-defect waveguides

Koji Yamada, Masaya Notomi, Akihiko Shinya, Itaru Yokohama, Tetsufumi Shoji, Tai Tsuchizawa, Toshifumi Watanabe, Jun-Ichi Takahashi, Emi Tamechika, Hirofumi Morita

Author Affiliations +

Proceedings Volume 4870, Active and Passive Optical Components for WDM Communications II; (2002) https://doi.org/10.1117/12.475545
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

We have experimentally demonstrated single-mode light-wave transmission and tunable waveguiding characteristics in photonic crystal (PC) waveguides constructed on a silicon-on-insulator (SOI) substrate as is most likely to be used for the a large scale integration of photonic circuits. Although off-plane diffractive leakage has been a serious problem in SOI-PC waveguides, we have overcome this problem in our narrow line-defect and phase-shifted-hole line-defect waveguide structures. These devices were developed through intensive theoretical studies on PC line-defect waveguieds. We have also demonstrated low-loss mode profile converter that will enable efficient connection between conventional silica-based waveguides and PC line-defect waveguides. The converter features an inversely-tapered silicon wire waveguide with an ultra-thin tip constructed on an SOI substrate. In our experiments, this converter proved capable of coupling loss as low as 0.5dB per conversion. These SOI-based devices represent an important step towards practical large-scale integrated photonic crystal circuits.

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Koji Yamada, Masaya Notomi, Akihiko Shinya, Itaru Yokohama, Tetsufumi Shoji, Tai Tsuchizawa, Toshifumi Watanabe, Jun-Ichi Takahashi, Emi Tamechika, and Hirofumi Morita "SOI-based photonic crystal line-defect waveguides", Proc. SPIE 4870, Active and Passive Optical Components for WDM Communications II, (11 July 2002); https://doi.org/10.1117/12.475545

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