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Proceedings Paper

Functional components in SOI photonic crystal slabs
Author(s): Akihiko Shinya; Masaya Notomi; Eiichi Kuramochi; Tetsuhumi Shoji; Toshihumi Watanabe; Tai Tsuchizawa; Kouji Yamada; Hirofumi Morita
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Paper Abstract

We study various types of two-dimensional photonic crystal (PhC) waveguides (WG) on silicon-on-insulator (SOI) substrates for future photonic integrated circuit (PIC) applications. One of our goals is to realize a low-loss single-mode PhC WG. Off-plane diffractive leakage above the cladding layer light line is a serious problem in SOI-based PhC-WGs. We overcame this problem in width-varied line defect waveguides whose core-widths are changed by sliding PhC domains or deforming holes beside the waveguides. Narrow-core WGs have a wide transmission band below the cladding layer light line, and wide-core WGs can greatly suppress the diffractive leakage even above the cladding layer light line, and both types have a very low propagation loss. Another goal is to achieve a highly efficient coupling between SOI-based PhC WGs and single-mode fibers (SMFs). Normally, the loss of such a coupling system is very large, i.e. over 20 dB, because of the quite different mode profiles of the WGs and SMFs, and this loss is an obstacle to the development of PhC-based devices. Our system achieves a very small mode-profile-conversion loss of about 3-4 dB/connection from 1500 to 1600 nm wavelength.

Paper Details

Date Published: 9 July 2003
PDF: 14 pages
Proc. SPIE 5000, Photonic Crystal Materials and Devices, (9 July 2003); doi: 10.1117/12.480057
Show Author Affiliations
Akihiko Shinya, NTT Corp. (Japan)
Masaya Notomi, NTT Corp. (Japan)
Eiichi Kuramochi, NTT Corp. (Japan)
Tetsuhumi Shoji, NTT Corp. (Japan)
Toshihumi Watanabe, NTT Corp. (Japan)
Tai Tsuchizawa, NTT Corp. (Japan)
Kouji Yamada, NTT Corp. (Japan)
Hirofumi Morita, NTT Corp. (Japan)

Published in SPIE Proceedings Vol. 5000:
Photonic Crystal Materials and Devices
Ali Adibi; Axel Scherer; Shawn Yu Lin, Editor(s)

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