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Journal of Nanomaterials
Volume 2014, Article ID 580157, 7 pages
Research Article

Modes and Carrier Density in Dispersive and Nonlinear Gain Planar Photonic Crystal Cavity

1School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan 411201, China
2School of Foreign Studies, Hunan University of Science and Technology, Xiangtan 411201, China

Received 24 January 2014; Accepted 9 March 2014; Published 17 April 2014

Academic Editor: Gong-Ru Lin

Copyright © 2014 Renlong Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The cavity mode and carrier density in dispersive and nonlinear gain planar photonic crystal cavities are studied with the three-dimensional finite-difference time-domain method. Planar photonic crystal cavity can enhance light mater interaction, which can be used to design a photonic crystal cavity laser. With the effect of both total internal reflection and photonic band gap confinement, the frequency responses of the planar photonic crystal cavity can be obtained by simulation. The effect of carrier diffusion is calculated through the laser rate equations. The electric field intensity distribution, temporal behavior of electric field energy, and carrier density characteristics are analyzed from the resonance cavity mode.