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Non-local metasurfaces for spectrally decoupled wavefront manipulation and eye tracking

Authors
Song, Jung-Hwanvan de Groep, JorikKim, Soo JinBrongersma, Mark L.
Issue Date
11월-2021
Publisher
NATURE PORTFOLIO
Citation
NATURE NANOTECHNOLOGY, v.16, no.11, pp.1224 - +
Indexed
SCIE
SCOPUS
Journal Title
NATURE NANOTECHNOLOGY
Volume
16
Number
11
Start Page
1224
End Page
+
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/136680
DOI
10.1038/s41565-021-00967-4
ISSN
1748-3387
Abstract
High optical-quality-factor, non-local metasurfaces enable independent functions across different wavelength bands. Metasurface-based optical elements typically manipulate light waves by imparting space-variant changes in the amplitude and phase with a dense array of scattering nanostructures. The highly localized and low optical-quality-factor (Q) modes of nanostructures are beneficial for wavefront shaping as they afford quasi-local control over the electromagnetic fields. However, many emerging imaging, sensing, communication, display and nonlinear optics applications instead require flat, high-Q optical elements that provide substantial energy storage and a much higher degree of spectral control over the wavefront. Here, we demonstrate high-Q, non-local metasurfaces with atomically thin metasurface elements that offer notably enhanced light-matter interaction and fully decoupled optical functions at different wavelengths. We illustrate a possible use of such a flat optic in eye tracking for eyewear. Here, a metasurface patterned on a regular pair of eye glasses provides an unperturbed view of the world across the visible spectrum and redirects near-infrared light to a camera to allow imaging of the eye.
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공과대학 (전기전자공학부)
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