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Cited 30 time in webofscience Cited 35 time in scopus
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Bright-Field and Edge-Enhanced Imaging Using an Electrically Tunable Dual-Mode Metalens SCIE SCOPUS

Title
Bright-Field and Edge-Enhanced Imaging Using an Electrically Tunable Dual-Mode Metalens
Authors
Badloe, TrevonKim, YeseulKim, JoohoonPark, HyemiBarulin, AleksandrDiep, Yen N.Cho, HansangKim, Won-SikKim, Young-KiKim, InkiRho, Junsuk
Date Issued
2023-07
Publisher
American Chemical Society
Abstract
The imaging of microscopic biological samples faces numerous difficulties due to their small feature sizes and low-amplitude contrast. Metalenses have shown great promise in bioimaging as they have access to the complete complex information, which, alongside their extremely small and compact footprint and potential to integrate multiple functionalities into a single device, allow for miniaturized microscopy with exceptional features. Here, we design and experimentally realize a dual-mode metalens integrated with a liquid crystal cell that can be electrically switched between bright-field and edge-enhanced imaging on the millisecond scale. We combine the concepts of geometric and propagation phase to design the dual-mode metalens and physically encode the required phase profiles using hydrogenated amorphous silicon for operation at visible wavelengths. The two distinct metalens phase profiles include (1) a conventional hyperbolic metalens for bright-field imaging and (2) a spiral metalens with a topological charge of +1 for edge-enhanced imaging. We demonstrate the focusing and vortex generation ability of the metalens under different states of circular polarization and prove its use for biological imaging. This work proves a method for in vivo observation and monitoring of the cell response and drug screening within a compact form factor.
URI
https://oasis.postech.ac.kr/handle/2014.oak/118113
DOI
10.1021/acsnano.3c02471
ISSN
1936-0851
Article Type
Article
Citation
ACS Nano, vol. 17, no. 15, page. 14678 - 14685, 2023-07
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김영기KIM, YOUNGKI
Dept. of Chemical Enginrg
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