skip to main content

DOE PAGESDOE PAGES

Title: Terahertz antireflection coating enabled by a subwavelength metallic mesh capped with a thin dielectric film

Metamaterials/metasurfaces have enabled unprecedented manipulation of electromagnetic waves. Here we present a new design of metasurface structure functioning as antireflection coatings. The structure consists of a subwavelength metallic mesh capped with a thin dielectric layer on top of a substrate. By tailoring the geometric parameters of the metallic mesh and the refractive index and thickness of the capping dielectric film, reflection from the substrate can be completely eliminated at a specific frequency. Compared to traditional methods such as coatings with single- or multi-layer dielectric films, the metasurface antireflection coatings are much thinner and the requirement of index matching is largely lifted. Here, this approach is particularly suitable for antireflection coatings in the technically challenging terahertz frequency range and is also applicable in other frequency regimes.
Authors:
 [1] ; ORCiD logo [2] ;  [2] ; ORCiD logo [2]
  1. Harbin Institute of Technology, Heilongjiang (China)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-16-20538
Journal ID: ISSN 1941-7411
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Terahertz Science & Technology
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 1941-7411
Publisher:
Scinco, Inc
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; material science; metasurfaces; antireflection coatings; terahertz; interference
OSTI Identifier:
1364586