Non-local metasurfaces for spectrally decoupled wavefront manipulation and eye tracking.
Nat Nanotechnol
; 16(11): 1224-1230, 2021 11.
Article
em En
| MEDLINE
| ID: mdl-34594006
ABSTRACT
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Nanoestruturas
/
Fenômenos Ópticos
/
Tecnologia de Rastreamento Ocular
/
Luz
Limite:
Humans
Idioma:
En
Revista:
Nat Nanotechnol
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Estados Unidos