Optimal design of sub-wavelength metal rectangular gratings for polarizing beam splitter based on effective medium theory |
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Authors: | Zhao Hua-Jun Peng Yong-Jun Tan Ju Liao Chang-Rong Li Peng and Ren Xiao-Xia |
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Institution: | Department of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China |
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Abstract: | A novel optimal design of sub-wavelength metal rectangular
gratings for the polarizing beam splitter (PBS) is proposed. The
method is based on effective medium theory and the method of
designing single layer antireflection coating. The polarization
performance of PBS is discussed by rigorous couple-wave analysis
(RCWA) method at a wavelength of 1550~nm. The result shows that
sub-wavelength metal rectangular grating is characterized by a high
reflectivity, like metal films for TE polarization, and high
transmissivity, like dielectric films for TM polarization. The
optimal design accords well with the results simulated by RCWA
method. |
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Keywords: | polarizing beam splitter sub-wavelength metal rectangular
gratings effective medium theory antireflection |
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