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Proceedings Paper

Achieving high numerical aperture near-infrared imaging based on an ultrathin cylinder dielectric metalens
Author(s): K. F. Lin; C. C. Hsieh; S. C. Hsin; W. F. Hsieh
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Paper Abstract

Artificial subwavelength dielectric meta-lens (ML), realization of ultrathin and light-weight, provides a potential candidate to replace traditional bulky curved lens with high image quality. A ML with 1.5 mm in diameter having numerical aperture NA ~ 0.60 at the near-infrared wavelength λ = 0.94 μm was designed by finite-difference timedomain (FDTD) method with speeding up optimization of MLs’ scheme by deep neural network (DNN) model. Additionally, an ultra-thin high NA ML was achieved by cost effective semiconductor manufacturing technology. The fabricated ML can focus an incident light down to a spot as small as ~ 5.2 μm with high optical efficiency of ~88.4% (focusing efficiency achieved 23.7%). We also provided efficient MLs’ semiconductor manufacturing technology for the development of optical device in the near-infrared image technology.

Paper Details

Date Published: 26 February 2020
PDF: 6 pages
Proc. SPIE 11290, High Contrast Metastructures IX, 112901O (26 February 2020); doi: 10.1117/12.2542783
Show Author Affiliations
K. F. Lin, VisEra Technologies Co. (Taiwan)
C. C. Hsieh, VisEra Technologies Co. (Taiwan)
S. C. Hsin, VisEra Technologies Co. (Taiwan)
W. F. Hsieh, VisEra Technologies Co. (Taiwan)

Published in SPIE Proceedings Vol. 11290:
High Contrast Metastructures IX
Connie J. Chang-Hasnain; Andrei Faraon; Weimin Zhou, Editor(s)

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