Transmission Properties of One-Dimensional Photonic Crystals Containing Anisotropic Metamaterials

• Published in: Chinese physics letters Vol. 27; no. 6; pp. 93 - 96
• Main Authors: Li-Wei, Zhang, Ling-Ling, Yan, Yu-Huan, Zhao, Li, Liu
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.06.2010
• Subjects: Anisotropy; Carrier frequencies; Crystal defects; Distortion; Gaussian; Group delay; Metamaterials; Photonic crystals; 一维光子晶体; 传输特性; 信息传输; 偏振相关; 各向异性; 脉冲传输; 超光速传播
• ISSN: 0256-307X; 1741-3540
• DOI: 10.1088/0256-307X/27/6/064101

The transmission properties of one-dimensional photonie crystals （1DPCs） containing anisotropic metamaterials are theoretically studied. It is shown that the 1DPCs can possess a similar zero average index （zero-n） gaps, the edges of zero-~ gap are weakly dependent on the incident angles, scale length and the polarization of the electromagnetic wave. When an impurity is introduced, a defect mode appears inside the zeron gap with a very weak dependence on incident angles and sealing. It is found that in such photonic crystals, a transmitted Gaussian pulse with its carrier frequency lying in the lower gap edge, in the defect mode and in the bandgap, can experience a positive or negative group delay and hence a subluminal, ultra.slow or superluminal propagation with small distortions. These properties of the photonic crystals have potential applications in the transfer of information.