CUED Publications database

Plasmonic Metalens for Narrowband Dual-Focus Imaging

Williams, C and Montelongo, Y and Wilkinson, TD (2017) Plasmonic Metalens for Narrowband Dual-Focus Imaging. Advanced Optical Materials, 5. p. 1700811. ISSN 2195-1071

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Abstract

© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim A new type of metalens with the capability to selectively focus narrowband light is reported at different focal planes depending on polarization. Two zone planes with two different focal lengths are spatially multiplexed and encoded in the subwavelength regime with arrays of orthogonal silver nanostructures, which are designed to exhibit strong wavelength- and polarization-dependent scattering profiles. Using this principle, imaging under whit e-light illumination with independent focal planes is experimentally demonstrated for each polarization at the narrowband resonant wavelength. Furthermore, each focal plane can be dynamically controlled with an output polarizer. In contrast to conventional refractive and diffractive optical elements, functional metalenses allow additional control over wavelength and polarization properties of light for a wide range of applications.

Item Type: Article
Uncontrolled Keywords: diffractive lenses holographic optical elements metasurfaces plasmonics polarization-selective devices subwavelength structures
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 14 Sep 2017 01:20
Last Modified: 24 Apr 2018 01:53
DOI: