Planar photonic chips with tailored angular transmission for high-contrast-imaging devices.

ABSTRACT: A limitation of standard brightfield microscopy is its low contrast images, especially for thin specimens of weak absorption, and biological species with refractive indices very close in value to that of their surroundings. We demonstrate, using a planar photonic chip with tailored angular transmission as the sample substrate, a standard brightfield microscopy can provide both darkfield and total internal reflection (TIR) microscopy images with one experimental configuration. The image contrast is enhanced without altering the specimens and the microscope configurations. This planar chip consists of several multilayer sections with designed photonic band gaps and a central region with dielectric nanoparticles, which does not require top-down nanofabrication and can be fabricated in a large

SUBMITTER: Kuai Y 

PROVIDER: S-EPMC8616932 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature