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Proceedings Paper

Band gap characteristics of anisotropic photonic crystals
Author(s): Gandhi Alagappan; Xiao Wei Sun; Ping Shum; Ming Bin Yu; T. Doan My
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Paper Abstract

The band gap characteristics of one-dimensional and two-dimensional photonic crystals made of uniaxial anisotropic materials were analyzed with a focus on the band gap characteristics as a function of optical axis orientation in the aniostropic material. For one-dimensional case, with optical axis normal to periodicity axis, the two polarization of on axis light will experience different refractive indexes and thus the degeneracy in photonic band will disappear. Theoretically we show that in some nonlinear materials, with presence of certain symmetry, the band lines correspond to two polarizations will degenerate under a high electric field. It is also shown that the gap position and size varies as the position of the optical axis varies and the range is limited by the birefringence of the anisotropic material. In two dimensional photonic crystal, we showed that, changing the position of optical axis in the propagation plane is simply change of symmetry in photonic band structure. If the position of the optical axis is varied in the transversal direction, we can open or close the band gap. The characteristic of anisotropic material, the direction dependant refractive index can be used to improve the band structure of conventional isotropic photonic crystal.

Paper Details

Date Published: 17 January 2005
PDF: 8 pages
Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); doi: 10.1117/12.575154
Show Author Affiliations
Gandhi Alagappan, Nanyang Technological Univ. (Singapore)
Xiao Wei Sun, Nanyang Technological Univ. (Singapore)
Ping Shum, Nanyang Technological Univ. (Singapore)
Ming Bin Yu, Institute of Microelectronics (Singapore)
T. Doan My, Institute of Microelectronics (Singapore)

Published in SPIE Proceedings Vol. 5644:
Optoelectronic Devices and Integration
Hai Ming; Xuping Zhang; Maggie Yihong Chen, Editor(s)

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