Asymmetric metasurface photodetectors for single-shot quantitative phase imaging.

ABSTRACT: The visualization of pure phase objects by wavefront sensing has important applications ranging from surface profiling to biomedical microscopy, and generally requires bulky and complicated setups involving optical spatial filtering, interferometry, or structured illumination. Here we introduce a new type of image sensors that are uniquely sensitive to the local direction of light propagation, based on standard photodetectors coated with a specially designed plasmonic metasurface that creates an asymmetric dependence of responsivity on angle of incidence around the surface normal. The metasurface design, fabrication, and angle-sensitive operation are demonstrated using a simple photoconductive detector platform. The measurement results, combined with computational imaging calculations, are

SUBMITTER: Liu J 

PROVIDER: S-EPMC11614331 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature