Open AccessMultifunctional focusing and accelerating of light with a simple flat lens
Author(s) -
Tahmid H. Talukdar,
Judson D. Ryckman
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.402572
Subject(s) - wavefront , optics , paraxial approximation , polarization (electrochemistry) , physics , tilt (camera) , light beam , ray , diffraction , lens (geology) , spatial light modulator , wavelength , beam (structure) , mechanical engineering , chemistry , engineering
The wavefronts emerging from phase gradient metasurfaces are typically sensitive to incident beam properties such as angle, wavelength, or polarization. While this sensitivity can result in undesired wavefront aberrations, it can also be exploited to construct multifunctional devices which dynamically vary their behavior in response to tuning a specified degree of freedom. Here, we show how incident beam tilt in a one dimensional metalens naturally offers a means for changing functionality between diffraction limited focusing and the generation of non-paraxial accelerating light beams. This attractively offers enhanced control over accelerating beam characteristics in a simple and compact form factor.