Abstract

A metamaterial structure consisting of a one-dimensional metal/air-gap subwavelength grating is investigated for optical antireflection for a germanium surface in the infrared regime. For incident light polarized perpendicularly to the metal grating lines, the metamaterial exhibits effective dielectric properties, and the Fabry–Perot-like resonance results in the elimination of the reflection and the enhancement of optical transmission. It is found that the subwavelength grating metamaterial antireflection structure does not require a deep-subwavelength grating period, which is advantageous for device fabrication. Optical transmittance as high as 93.4% with complete elimination of the reflection is shown in the midwave infrared range.

© 2015 Optical Society of America

Polarization-independent and omnidirectional nearly perfect absorber with ultra-thin 2D subwavelength metal grating in the visible region

Wenchao Zhou, Kaiwei Li, Chao Song, Peng Hao, Mingbo Chi, Muxin Yu, and Yihui Wu
Opt. Express 23(11) A413-A418 (2015)

Bilayer metallic nanofilms as broadband antireflection coatings in terahertz optical systems

Wei En Lai, Huai Wu Zhang, Yao Hua Zhu, Qi Ye Wen, Wei Wei Du, and Xiao Li Tang
Opt. Express 22(3) 2174-2184 (2014)

Hyperbolic metamaterial feasible for fabrication with direct laser writing processes

Xu Zhang, Sanjoy Debnath, and Durdu Ö. Güney
J. Opt. Soc. Am. B 32(6) 1013-1021 (2015)

Optical negative index metamaterial based on hexagonal arrays of metallic meta-atoms with threefold rotational symmetry

M. Giloan and R. Gutt
J. Opt. Soc. Am. B 33(1) 27-34 (2016)

Realization of sinusoidal transmittance with subwavelength metallic structures

G. Vincent, R. Haidar, S. Collin, N. Guérineau, J. Primot, E. Cambril, and J.-L. Pelouard
J. Opt. Soc. Am. B 25(5) 834-840 (2008)