Study on transmission characteristics in photonic crystals with negative effective index of refraction by Tinggen Shen, Zhenghua Li, Junfeng Ma, Yong Sheng, Pengpeng Jiao, Bin Wu, and Chenghua Xu

Crystal Research and Technology

Cryst. Res. Technol. 43, 200 (2008) - Abstract -

Study on transmission characteristics in photonic crystals with negative effective index of refraction

Tinggen Shen, Zhenghua Li*, Junfeng Ma, Yong Sheng, Pengpeng Jiao, Bin Wu, and Chenghua Xu

Institude of Applied Physics, Jiangsu University, Zhenjiang 212013, China
*Department of Electronic Engineering, East China Normal University, Shanghai 200062, China

Keywords	transmission spectra, photonic crystals (PCs), negative effective index of refraction, Bloch resonance wave, stimulated emission
PACS	08.15.BH
DOI	10.1002/crat.200711063

Transmission spectra from equivalent negative refractive photonic crystals (PCs) composed of a triangular array of air cylinders in a GaAs matrix are studied by finite-difference time-domain method in the paper. Mechanism of wave resonance is probed and propagation of optical waves in the PCs is described in terms of effective refraction index and Bloch waves. Our numerical results show that probability of spontaneous radiation would be enhanced extremely under the influence of Bloch resonance waves, stimulated emission and photon tunnel effect, resulting in the optical waves localized greatly in the PCs at particular frequencies. In addition, we find out that the position of transmission peaks, with values far greater than unit, can be controlled by tuning the central frequency of waveguide source. It means that photon current in the PCs also can be controlled to optimize transmission properties of PCs, so as to meet the requirements of novel optical devices based on PCs.

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