期刊
NATURE NANOTECHNOLOGY
卷 16, 期 11, 页码 1224-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41565-021-00967-4
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资金
- US Air Force [FA9550-17-1-0331]
- Magic Leap
- National Science Foundation [ECCS-1542152]
- Basic Science Research Programme through the National Research Foundation of Korea [NRF-2016R1A6A3A03012480]
- Rubicon Fellowship from the Nederlandse organisatie voor Wetenschappelijk Onderzoek (NWO)
The article discusses high-Q, non-local metasurfaces with independent functions across different wavelength bands, and how this technology can be used for flat optical elements in eye tracking applications.
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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