Chinese Optics Letters, 2019, 17 (8): 082301, Published Online: Jul. 16, 2019  

Angle tolerant transmissive color filters exploiting metasurface incorporating hydrogenated amorphous silicon nanopillars Download: 753次

Author Affiliations
1 Department of Electronic Engineering, Kwangwoon University, Seoul 01897, South Korea
2 Laser Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200, Australia
3 College of Information Science and Technology, Jinan University, Guangzhou 510632, China
Abstract
Angle tolerant transmissive subtractive color filters incorporating a metasurface exploiting hydrogenated amorphous silicon nanopillars (NPs) on a glass substrate were proposed and demonstrated. The achieved transmission efficiency ranged from 75% to 95% at off-resonance wavelengths. For an NP resonator, electric and magnetic-field distributions in conjunction with absorption cross-sections were investigated to confirm a resonant transmission dip, which is primarily governed by the absorption resulting from simultaneous excitation of magnetic and electric dipoles via Mie scattering. The proposed devices exhibit higher angular tolerance and lower crosstalk for the absorption spectra and, therefore, are applicable with photodetectors, image sensors, and imaging/display devices.

Ishwor Koirala, Chul-Soon Park, Sang-Shin Lee, Duk-Yong Choi. Angle tolerant transmissive color filters exploiting metasurface incorporating hydrogenated amorphous silicon nanopillars[J]. Chinese Optics Letters, 2019, 17(8): 082301.

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