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Proceedings Paper

Decoupling efficiency of multiple coupled photonic crystal waveguides
Author(s): Tianbao Yu; Lingjuan He; Jun Zhang; Liguang Fang; Ping Wu
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Paper Abstract

We investigate decoupling characteristics and efficiency of multiple coupled photonic crystal waveguides (M-CPCWs) using coupled mode theory on the basis of self-imaging principle. The three-, four- and eight-CPCWs are selected as the typical structures to discuss the general characteristics of the M-CPCWs. It is found that around the frequency where the multiple guided modes are almost degenerate, which leads to that the power transfer in the M-CPCWs is eliminated for any entrance. The frequency region for decoupling is insensitive to the number of coupled waveguides with the extinction ratios higher than -15dB. An optimization way by introducing a defect mode is utilized to enhance the decoupling efficiency. The simulation results are based on the finite-difference time-domain method. The decoupling of the M-CPCWs exhibit many advantages and may have practical applications in photonic integrated circuits.

Paper Details

Date Published: 2 December 2009
PDF: 11 pages
Proc. SPIE 7631, Optoelectronic Materials and Devices IV, 763126 (2 December 2009); doi: 10.1117/12.855655
Show Author Affiliations
Tianbao Yu, Nanchang Univ. (China)
Institute of Semiconductors (China)
Lingjuan He, Nanchang Univ. (China)
Jun Zhang, Nanchang Univ. (China)
Liguang Fang, Nanchang Univ. (China)
Ping Wu, Nanchang Univ. (China)

Published in SPIE Proceedings Vol. 7631:
Optoelectronic Materials and Devices IV
Jian-Jun He; Guang-Hua Duan; Fumio Koyama; Ming C. Wu, Editor(s)

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