中国物理B ›› 2009, Vol. 18 ›› Issue (12): 5326-5330.doi: 10.1088/1674-1056/18/12/034

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Optimal design of sub-wavelength metal rectangular gratings for polarizing beam splitter based on effective medium theory

赵华君, 彭拥军, 谭菊, 廖长荣, 李鹏, 任晓霞   

  1. Department of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
  • 收稿日期:2009-01-15 修回日期:2009-06-22 出版日期:2009-12-20 发布日期:2009-12-20
  • 基金资助:
    Project supported by Science Foundation of the Chongqing Committee of Education, China (Grant No KJ071205).

Optimal design of sub-wavelength metal rectangular gratings for polarizing beam splitter based on effective medium theory

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)   

  1. Department of Electronic and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, China
  • Received:2009-01-15 Revised:2009-06-22 Online:2009-12-20 Published:2009-12-20
  • Supported by:
    Project supported by Science Foundation of the Chongqing Committee of Education, China (Grant No KJ071205).

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摘要： 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.

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.

Key words: polarizing beam splitter, sub-wavelength metal rectangular gratings, effective medium theory, antireflection

中图分类号:  (Gratings)

  • 42.79.Dj
42.15.Eq (Optical system design) 42.79.Fm (Reflectors, beam splitters, and deflectors) 42.79.Wc (Optical coatings)