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Proceedings Paper

The design method of photonic crystal directional coupler switch with short switching length and wide bandwidth
Author(s): Toru Ogawa; Noritsugu Yamamoto; Yoshinori Watanabe; Kazuhiro Komori; Masahide Itoh; Toyohiko Yatagai
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Paper Abstract

We have developed a design method for a photonic crystal directional coupler switch (PCDCSw) with a short switching length and wide bandwidth. Usually, the relationship between the switching length and bandwidth has a trade-off. To overcome this trade-off relation, we invented the suitable dispersion curve of eigenmodes of the PCDCSw. To actually obtain this dispersion curve, we examine the electromagnetic field of an ordinary PCDC at each wavenumber, and modify the even-mode mainly by enlarging the radius of the airs-holes and by shifting the position of the air-holes closer to the waveguides in the photonic crystals. We confirm using numerical simulation that the switching length of the new designed structure is only 4% of that for the ordinary PCDC.

Paper Details

Date Published: 13 April 2005
PDF: 9 pages
Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); doi: 10.1117/12.589921
Show Author Affiliations
Toru Ogawa, National Institute of Advanced Industrial Science and Technology (Japan)
Univ. of Tsukuba (Japan)
Noritsugu Yamamoto, National Institute of Advanced Industrial Science and Technology (Japan)
Yoshinori Watanabe, National Institute of Advanced Industrial Science and Technology (Japan)
Kazuhiro Komori, National Institute of Advanced Industrial Science and Technology (Japan)
Masahide Itoh, Univ. of Tsukuba (Japan)
Toyohiko Yatagai, Univ. of Tsukuba (Japan)


Published in SPIE Proceedings Vol. 5733:
Photonic Crystal Materials and Devices III
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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