The design method of photonic crystal directional coupler switch with short switching length and wide bandwidth

Toru Ogawa; Noritsugu Yamamoto; Yoshinori Watanabe; Kazuhiro Komori; Masahide Itoh; Toyohiko Yatagai

doi:10.1117/12.589921

13 April 2005 The design method of photonic crystal directional coupler switch with short switching length and wide bandwidth

Toru Ogawa, Noritsugu Yamamoto, Yoshinori Watanabe, Kazuhiro Komori, Masahide Itoh, Toyohiko Yatagai

Author Affiliations +

Proceedings Volume 5733, Photonic Crystal Materials and Devices III; (2005) https://doi.org/10.1117/12.589921
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

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.

Citation Download Citation

Toru Ogawa, Noritsugu Yamamoto, Yoshinori Watanabe, Kazuhiro Komori, Masahide Itoh, and Toyohiko Yatagai "The design method of photonic crystal directional coupler switch with short switching length and wide bandwidth", Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); https://doi.org/10.1117/12.589921

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