The design of a polarizing beam splitter made from a dielectric rectangular-groove grating |
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| Authors: | Juan Liu Hua Gao Jing Zhou Dahe Liu |
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| Institution: | 1. Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China;2. School of Material Science and Technology, China University of Geosciences, Beijing 100083, China;1. College of Opto-electronics Engineering, Changchun University of Science and Technology, Changchun 130022, China;2. College of Science, Changchun University of Science and Technology, Changchun 130022, China;1. Dept. of Physics, University of Gujrat, Hafiz Hayat Campus, 50700 Gujrat, Pakistan;2. Institute of Microengineering and Nanoelectroics, Universiti Kebangsaan Malaysia, UKM Bangi, 43600 Selangor, Malaysia;1. Physics and Electrical Engineering Institute, AnQing Teachers University, AnQing 246133, China;2. Telecommunication Engineering Institute, Air Force Engineering University, Xi''an 710077, China;1. State Key laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;2. The University of Chinese Academy of Sciences, 100049 Beijing, China;1. School of Sciences, China University of Geosciences, Beijing 100083, China;2. Department of Electrical Engineering, University of California, Santa Cruz, CA 95064, United States |
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| Abstract: | It has been reported that a polarizing beam splitter based on a rectangular-groove grating (a grating polarizing beam splitter) can be easily designed for specific applications using the modal method. In this paper, the eigenvalue equation of the modal method is transformed to a new form. Using this new form of the eigenvalue equation, it is shown that the design of a grating polarizing beam splitter can be independent of the incident wavelength. The period and the groove depth can be designed using values normalized to the incident wavelength, which apply to a range of wavelengths as long as the effects of dispersion can be neglected. Numerical simulations of fused silica gratings are presented and analyzed. It is concluded that the preferable choice for the grating period is 0.8–0.9 times the incident wavelength. |
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