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Tunable reflection minima of nanostructured antireflective surfaces

Tunable reflection minima of nanostructured antireflective surfaces
Tunable reflection minima of nanostructured antireflective surfaces
Broadband antireflection schemes for silicon surfaces based on the moth-eye principle and comprising arrays of subwavelength-scale pillars are applicable to solar cells, photodetectors, and stealth technologies and can exhibit very low reflectances. We show that rigorous coupled wave analysis can be used to accurately model the intricate reflectance behavior of these surfaces and so can be used to explore the effects of variations in pillar height, period, and shape. Low reflectance regions are identified, the extent of which are determined by the shape of the pillars. The wavelengths over which these low reflectance regions operate can be shifted by altering the period of the array. Thus the subtle features of the reflectance spectrum of a moth-eye array can be tailored for optimum performance for the input spectrum of a specific application.
0003-6951
133108-133110
Boden, S.A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Bagnall, D.M.
5d84abc8-77e5-43f7-97cb-e28533f25ef1
Boden, S.A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Bagnall, D.M.
5d84abc8-77e5-43f7-97cb-e28533f25ef1

Boden, S.A. and Bagnall, D.M. (2008) Tunable reflection minima of nanostructured antireflective surfaces. Applied Physics Letters, 93 (13), 133108-133110.

Record type: Article

Abstract

Broadband antireflection schemes for silicon surfaces based on the moth-eye principle and comprising arrays of subwavelength-scale pillars are applicable to solar cells, photodetectors, and stealth technologies and can exhibit very low reflectances. We show that rigorous coupled wave analysis can be used to accurately model the intricate reflectance behavior of these surfaces and so can be used to explore the effects of variations in pillar height, period, and shape. Low reflectance regions are identified, the extent of which are determined by the shape of the pillars. The wavelengths over which these low reflectance regions operate can be shifted by altering the period of the array. Thus the subtle features of the reflectance spectrum of a moth-eye array can be tailored for optimum performance for the input spectrum of a specific application.

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Published date: 2008
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 267718
URI: https://eprints.soton.ac.uk/id/eprint/267718
ISSN: 0003-6951
PURE UUID: 740f89f4-8ea2-429b-a3c3-3bf061640ef7
ORCID for S.A. Boden: ORCID iD orcid.org/0000-0002-4232-1828

Catalogue record

Date deposited: 29 Jul 2009 10:55
Last modified: 06 Jun 2018 12:43

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