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Proceedings Paper

A complex photonic crystal cavity with improved properties of optical filtering
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Paper Abstract

We investigate a complex cavity composed of three simple cavities, which are formed by three simple defects in a one-dimensional photonic crystal (PC), by the optical transmission method. We set two of the simple cavities to be the same, and let the cavity-length of the third one vary. Generally, two or more narrow resonant transmission modes emerge in the bandgap region; the position of one of them is basically fixed with different fine structures, in which exists a fixed crest, while the other modes wander in the bandgap region as the cavity-length of the third cavity varies. We find the optimized the relative coupling length being 0.447 for the complex cavity. Introducing the parameter - degree of rectangularity, we find that the complex PC cavity is much more close to an ideal narrow band-pass filter than a simple PC defect cavity. It is surprising that the degree of rectangularity is insensitive to the number of periods in the structures.

Paper Details

Date Published: 31 January 2005
PDF: 8 pages
Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); doi: 10.1117/12.572011
Show Author Affiliations
Zhengbiao Ouyang, Shenzhen Univ. (China)
Yiling Sun, Shenzhen Univ. (China)
Dengguo Zhang, Shenzhen Univ. (China)
Jianzhang Cao, Shenzhen Univ. (China)
Shuangchen Ruan, Shenzhen Univ. (China)
Jingzhen Li, Shenzhen Univ. (China)

Published in SPIE Proceedings Vol. 5624:
Semiconductor and Organic Optoelectronic Materials and Devices
Chung-En Zah; Yi Luo; Shinji Tsuji, Editor(s)

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