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Proceedings Paper

Investigation of feedback characteristics in single planar waveguide-coupled square microcavity by FDTD technique
Author(s): Guoping Lin; Le Ma; Benrui Zheng; Huiying Xu; Zhiping Cai
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Paper Abstract

Feedback characteristics in single planar waveguide-coupled square microcavity are investigated by using the two-dimensional finite-difference time-domain method. A square microcavity with refractive index of 3.5 and side length of 2.2μm plays as a wavelength selective feedback element, and a single planar waveguide with width of 0.2μm is used to input and output light in the simulation. Simulation results show that most of the on-resonance extinction in transmitted optical power through the planar waveguide can be reflected. The highest reflection observed is more than 92% of the incident power at the resonance wavelength. For better understanding the high reflection phenomenon, the steady field patterns of single waveguide coupled square microcavity has also been obtained. The influence of coupling gap between the cavity and waveguide, on the resonance wavelength, reflection efficiency and the linewidth of reflection peak has been studied. With increasing gap, the resonance position shifts to the longer wavelength, and the linewidth narrows. The results also show that an optimized gap exits for the highest optical power reflection.

Paper Details

Date Published: 5 February 2008
PDF: 7 pages
Proc. SPIE 6838, Optoelectronic Devices and Integration II, 68381D (5 February 2008); doi: 10.1117/12.752523
Show Author Affiliations
Guoping Lin, Xiamen Univ. (China)
Le Ma, Xiamen Univ. (China)
Benrui Zheng, Xiamen Univ. (China)
Huiying Xu, Xiamen Univ. (China)
Zhiping Cai, Xiamen Univ. (China)


Published in SPIE Proceedings Vol. 6838:
Optoelectronic Devices and Integration II
Xuping Zhang; Hai Ming; Maggie Yihong Chen, Editor(s)

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