Near-maximum microwave absorption in a thin metal film at the pseudo-free-standing limit.

ABSTRACT: Electromagnetic absorbers based on ultra-thin metallic film are desirable for many applications such as plasmonics, metamaterials, and long-wavelength detectors. A metallic film will achieve a maximum 50% of electromagnetic wave absorption, frequency independent, at a thickness defined by its conductivity, typically in the sub-Angstrom range for good metals if bulk conductivity is maintained throughout. This makes it extremely difficult to obtain substantial absorption from thin metal films, in contrast to 2D materials such as graphene. Luckily, however, from a practical point of view, metal conductivity is drastically reduced as the film becomes sub-100 nm, to make it a race between the thinnest possible metal thickness experimentally achievable vs the conductivity reduction. Here, we dem

SUBMITTER: Haddadi M M 

PROVIDER: S-EPMC9626603 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature