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.
Received: 15 January 2009
Revised: 22 June 2009
Accepted manuscript online:
Fund: Project supported by Science
Foundation of the Chongqing Committee of Education, China (Grant No
KJ071205).
Cite this article:
Zhao Hua-Jun(赵华君),Peng Yong-Jun(彭拥军),Tan Ju(谭菊) Liao Chang-Rong(廖长荣),Li Peng(李鹏), and Ren Xiao-Xia(任晓霞) Optimal design of sub-wavelength metal rectangular gratings for polarizing beam splitter based on effective medium theory 2009 Chin. Phys. B 18 5326
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