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Proceedings Paper

Drop filters in a rod-type photonic crystal based on self-collimation ring resonators
Author(s): Guimin Lin; Xiyao Chen; Nan Lin; Junjun Li; Yishen Qiu
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Paper Abstract

We design a rod-type drop filter (RTDF) in a two-dimensional photonic crystal (2D PhC) employing self-collimation (SC) effect. The perfect 2D PhC consists of a square-lattice of cylindrical silicon rods in air. The dielectric constant and the radius of host rods are ε=12.25 (correspondingly the refractive index n = 3.5) and r=0.40a respectively, where a is the lattice constant. In such a PhC, self-collimation phenomenon occurs for transverse-magnetic (TM) light beams with frequencies between 0.176c/a and 0.192c/a. The proposed RTDF based on a self-collimation ring resonator (SCRR) consists of two beam splitters and two mirrors. The performances of the SCRR are investigated with the finite-difference time-domain (FDTD) simulation technique. The calculation results show that the transmissivity spectrum at the drop port has nearly equal peak spacing which will decreases when the geometrical length of the SCRR is increased. Moreover, the full width at half maximum (FWHM) and thus quality (Q) factor of peaks can be easily tuned by changing the reflectivity of two beam splitters.

Paper Details

Date Published: 17 November 2010
PDF: 6 pages
Proc. SPIE 7847, Optoelectronic Devices and Integration III, 78472G (17 November 2010); doi: 10.1117/12.870010
Show Author Affiliations
Guimin Lin, Minjiang Univ. (China)
Xiyao Chen, Minjiang Univ. (China)
Nan Lin, Minjiang Univ. (China)
Junjun Li, Fujian Normal Univ. (China)
Yishen Qiu, Fujian Normal Univ. (China)

Published in SPIE Proceedings Vol. 7847:
Optoelectronic Devices and Integration III
Xuping Zhang; Hai Ming; Alan Xiaolong Wang, Editor(s)

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