Metasurfaces for suppressing reflection over broadband
Optics
2019-04-03 v1
Abstract
Surfaces patterned with arrays of quasi-periodic air holes having conical depth profile have been studied for their effectiveness in suppressing air-substrate reflection in the wavelength range of 450-1350 nm (limited by our measurement). The role of quasi-periodic air-hole pattern, depth of holes and launch angle on the observed antireflection behavior are investigated. The average optical transmittance of the patterned quartz substrate at near normal incidence is more than 97% and reflectance is less than 2%. Patterned quartz surfaces with 450 nm thin graded rarefaction region maintain the antireflective property up to 30{\deg} (limited by our measurements) angle of incidence.
Keywords
Cite
@article{arxiv.1503.00219,
title = {Metasurfaces for suppressing reflection over broadband},
author = {Anuradha Patra and Ajith P. Ravishankar and Arvind Nagarajan and Venu Gopal Achanta},
journal= {arXiv preprint arXiv:1503.00219},
year = {2019}
}
Comments
9 pages, 5 figures