Fast tunable metamaterial liquid crystal achromatic waveplate.

ABSTRACT: Photonic metamaterials combined with liquid crystals (LCs) for tunability is a great niche for building miniature devices with high performance such as fast flat tunable lenses, tunable filters, and waveplates. Sub-wavelength or nano-grating surfaces are homogenized to uniaxial waveplates with negative birefringence of unique dispersion when the period is less than the wavelength by at least a few times. This uniaxial metasurface, combined with the LC layer, is shown to act as a tunable retardation achromatic waveplate with 8 μm thick LC layer operating over wide spectral and angular ranges, as compared to using two nematic liquid crystal (NLC) retarders of thicknesses on the order of 30-60 μm, when no metasurface is used. Hence the device becomes miniature and 50× faster due to the thinne

SUBMITTER: Abu Aisheh M 

PROVIDER: S-EPMC11501672 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature