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Positive-negative birefraction phenomenon for TM polarization in annular photonic crystal |
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| Authors: | Yuan Zhang Yifeng Shen Jie Zhou Yongchun Wang Fangfang Wu Jian Sun Changqing Guo Physics |
| Institution: | Yuan Zhang 1,Yifeng Shen 1,2,Jie Zhou 1,Yongchun Wang 1,Fangfang Wu1,Jian Sun 1,and Changqing Guo 1 1Physics Department of the Science College,China University of Mining and Technology,Xuzhou 221116,China 2Surface Physics Laboratory,Fudan University,Shanghai 200433,China |
| Abstract: | We propose a two-dimensional (2D) annular photonic crystal (APC) with dual equi-frequency contours (EFCs) in one band. The refractive behaviors of a Gaussian beam incident from air to the APC are analyzed by the EFC analysis and finite-diflerence time-domain (FDTD) method. The results show the positive-negative birefraction phenomenon for the transverse magnetic (TM) polarization in the same band occurs at the interface between air and the APC, and the surface termination of the APC has a large effect on th... |
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