Colloidal self-assembly based ultrathin metasurface for perfect absorption across the entire visible spectrum.

ABSTRACT: Perfect absorption over the entire visible spectrum can create a dark background for acquiring images with high contrast and improved resolution, which is crucial for various applications such as medical imaging, biological detection, and industrial non-destructive testing. The broadband absorption is desired to be achieved in an ultrathin structure for low noise as well as high integration. Here, we experimentally demonstrate a metasurface broadband perfect absorber with an ultrathin thickness of 148 nm and a large area of ∼10 cm². Such a metasurface, with more than 97% absorption in the wavelength range from 400 to 800 nm, is composed of chromium nanodisk hexagonal array deposited on a chromium substrate with a silica spacer. A self-assembly based colloidal lithography nanofab

SUBMITTER: Jiang J 

PROVIDER: S-EPMC11502047 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature