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High numerical aperture RGB achromatic metalens in the visible SCIE SCOPUS

Title
High numerical aperture RGB achromatic metalens in the visible
Authors
SANGWON, BAEKKIM, JOOHOONKIM, YESEULWONSEOK, CHOBadloe, TrevonMOON, SEONGWONRHO, JUNSUKLEE, JONG LAM
Date Issued
2022-12
Publisher
OSA Publishing
Abstract
We theoretically and experimentally demonstrate an RGB achromatic metalens that operates concurrently at three visible wavelengths (lambda = 450, 532, and 700 nm) with a high numerical aperture of 0.87. The RGB metalens is designed by simple integration of metalens components with the spatial interleaving method. The simulated spatial interleaving metalens shows RGB achromatic operation with focusing efficiencies of 25.2%, 58.7%, and 66.4% at the wavelengths of 450, 532, and 700 nm, respectively. A 450 mu m diameter metalens operating at three designated wavelengths is fabricated with low-loss hydrogenated amorphous silicon. The fabricated metalens has the measured focusing efficiencies of 5.9%, 11.3%, and 13.6% at lambda = 450, 532, and 700 nm, respectively. The Strehl ratios of 0.89, 0.88, and 0.82 are obtained at given wavelengths, which show a capability of diffraction-limited operation.(c) 2022 Chinese Laser Press
URI
https://oasis.postech.ac.kr/handle/2014.oak/116081
DOI
10.1364/PRJ.470004
ISSN
2327-9125
Article Type
Article
Citation
Photonics Research, vol. 10, no. 12, page. B30 - B39, 2022-12
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이종람LEE, JONG LAM
Dept of Materials Science & Enginrg
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