DOI: 10.17586/1023-5086-2021-88-04-52-60

Metal-coated nano-grating for polarizer under large deviation angle incidence

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Jimin Fang, Bo Wang Metal-coated nano-grating for polarizer under large deviation angle incidence (Металлизированные нанорешётки для поляризаторов с большим диапазоном углов падения) [на англ. яз.] // Оптический журнал. 2021. Т. 88. № 4. С. 52–60. http://doi.org/10.17586/1023-5086-2021-88-04-52-60

Jimin Fang, Bo Wang Metal-coated nano-grating for polarizer under large deviation angle incidence (Металлизированные нанорешётки для поляризаторов с большим диапазоном углов падения) [in English] // Opticheskii Zhurnal. 2021. V. 88. № 4. P. 52–60. http://doi.org/10.17586/1023-5086-2021-88-04-52-60

For citation (Journal of Optical Technology):

Jimin Fang and Bo Wang, "Metal-coated nano-grating for a polarizer under large deviation angle incidence," Journal of Optical Technology. 88(4), 202-208 (2021). https://doi.org/10.1364/JOT.88.000202

Abstract:

In order to obtain a grating-based polarizer with high efficiency and high extinction ratio, we proposed a multilayer metal-coated nano-grating operated at the wavelength of 1550 nm. Different from previous most reported structures, the suggested structure of the grating works at the incident angle 45 degrees, so that the reflection direction is perpendicular to the transmission direction. The reflection extinction ratio and transmission extinction ratio can reach 49.15 dB and 55.49 dB, respectively. The metal layer and Ta2O5 dielectric layer are added to improve the performance of the grating. Most importantly, the results show that the extinction ratio of the two orthogonally polarized components of light can be larger than 20 dB within angular width 26.1°, between 29.1−55.2°. The grating can be widely used in liquid crystal display devices owing to its small size and strong anti-interference ability.

Keywords:

multilayer metal-coated grating, polarizer, large deviation angle incidence

Acknowledgements:

This work is supported by the Science and Technology Program of Guangzhou (202002030284, 202007010001).

OCIS codes: 050.1380, 230.5440, 050.1950

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