CUED Publications database

Plasmonic metalens for narrowband dual-focus imaging

Williams, C and Montelongo, Y and Wilkinson, TD Plasmonic metalens for narrowband dual-focus imaging. Advanced Optical Materials. (Unpublished)

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We report a new type of metalens with the capability to selectively focus narrowband light at different focal planes depending on polarization. Two zone planes with two different focal lengths are spatially multiplexed and encoded, in the sub-wavelength regime with arrays of orthogonal silver nanostructures, which are designed to exhibit strong wavelength- and polarization-dependent scattering profiles. Using this principle, we experimentally demonstrate imaging under white light illumination with independent focal planes for each polarization at the narrow band 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: Nanophotonics Plasmonics Imaging Optics
Divisions: Div B > Photonics
Depositing User: Cron Job
Date Deposited: 14 Sep 2017 01:20
Last Modified: 19 Sep 2017 01:33