Design of a Fused-Silica Subwavelength Polarizing Beam Splitter Grating Based on the Modal Method  

作　　者：赵华君 袁代蓉 王沛 鲁拥华 明海 

机构地区：[1]Department of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160 [2]Anhui Key Lab of Optoelectronic Science and Technology, Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei 230026

出　　处：《Chinese Physics Letters》2010年第2期127-130,共4页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant No 2006CB302905, the National Natural Science Foundation of China under Grant Nos 60736037 and 10704070, the Science and Technological Fund of Anhui Province for Outstanding Youth （08040106805）, and the Chongqing Municipal Education Commission （No KJ071205）.

摘　　要：A polarizing beam splitter （PBS） design based on a fused-silica lamellar subwavelength transmission grating is demonstrated with the modal method, where TE- and TM-polarized waves are mainly diffracted in the -1st and 0th orders, respectively. The physical explanation of the grating diffraction is illustrated by the interference of the corresponding parts of the two propagating modes, which is very similar to a Mach-Zehnder interferometer. It is shown that diffraction efficients over 99% for a TM-polarized wave in the -1st order and 90% for a TE-polarized wave in the 0th order are obtained at the wavelength of 1.053 μm. The polarization transmission extinction ratios are better than 33 dB and 51 dB for the order 0th and the -1st order, respectively. The splitting properties of the PBS grating designed by the modal method are in good agreement with the results simulated by the rigorous coupled wave analysis method.A polarizing beam splitter （PBS） design based on a fused-silica lamellar subwavelength transmission grating is demonstrated with the modal method, where TE- and TM-polarized waves are mainly diffracted in the -1st and 0th orders, respectively. The physical explanation of the grating diffraction is illustrated by the interference of the corresponding parts of the two propagating modes, which is very similar to a Mach-Zehnder interferometer. It is shown that diffraction efficients over 99% for a TM-polarized wave in the -1st order and 90% for a TE-polarized wave in the 0th order are obtained at the wavelength of 1.053 μm. The polarization transmission extinction ratios are better than 33 dB and 51 dB for the order 0th and the -1st order, respectively. The splitting properties of the PBS grating designed by the modal method are in good agreement with the results simulated by the rigorous coupled wave analysis method.

关 键 词：OPTICS quantum optics and lasers 

分 类 号：TN405.98[电子电信—微电子学与固体电子学] TN929.11