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Suppression of backscattered diffraction from sub-wavelength ‘moth-eye’ arrays

Suppression of backscattered diffraction from sub-wavelength ‘moth-eye’ arrays
Suppression of backscattered diffraction from sub-wavelength ‘moth-eye’ arrays
The eyes and wings of some species of moth are covered with arrays of nanoscale features that dramatically reduce reflection of light. There have been multiple examples where this approach has been adapted for use in antireflection and antiglare technologies with the fabrication of artificial moth-eye surfaces. In this work, the suppression of iridescence caused by the diffraction of light from such artificial regular moth-eye arrays at high angles of incidence is achieved with the use of a new tiled domain design, inspired by the arrangement of features on natural moth-eye surfaces. This bio-mimetic pillar architecture contains high optical rotational symmetry and can achieve high levels of diffraction order power reduction. For example, a tiled design fabricated in silicon and consisting of domains with 9 different orientations of the traditional hexagonal array exhibited a ~96% reduction in the intensity of the ?1 diffraction order. It is suggested natural moth-eye surfaces have evolved a tiled domain structure as it confers efficient antireflection whilst avoiding problems with high angle diffraction. This combination of antireflection and stealth properties increases chances of survival by reducing the risk of the insect being spotted by a predator. Furthermore, the tiled domain design could lead to more effective artificial moth-eye arrays for antiglare and stealth applications.
1094-4087
1-11
Stavroulakis, Petros I.
3c5a74ac-168a-471c-b86d-0d70fb7d2813
Boden, Stuart A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Johnson, Thomas
e122bfc0-cd5a-4a96-8345-05d896a30de4
Bagnall, Darren M.
5d84abc8-77e5-43f7-97cb-e28533f25ef1
Stavroulakis, Petros I.
3c5a74ac-168a-471c-b86d-0d70fb7d2813
Boden, Stuart A.
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Johnson, Thomas
e122bfc0-cd5a-4a96-8345-05d896a30de4
Bagnall, Darren M.
5d84abc8-77e5-43f7-97cb-e28533f25ef1

Stavroulakis, Petros I., Boden, Stuart A., Johnson, Thomas and Bagnall, Darren M. (2013) Suppression of backscattered diffraction from sub-wavelength ‘moth-eye’ arrays. Optics Express, 21 (1), 1-11. (doi:10.1364/OE.21.000001).

Record type: Article

Abstract

The eyes and wings of some species of moth are covered with arrays of nanoscale features that dramatically reduce reflection of light. There have been multiple examples where this approach has been adapted for use in antireflection and antiglare technologies with the fabrication of artificial moth-eye surfaces. In this work, the suppression of iridescence caused by the diffraction of light from such artificial regular moth-eye arrays at high angles of incidence is achieved with the use of a new tiled domain design, inspired by the arrangement of features on natural moth-eye surfaces. This bio-mimetic pillar architecture contains high optical rotational symmetry and can achieve high levels of diffraction order power reduction. For example, a tiled design fabricated in silicon and consisting of domains with 9 different orientations of the traditional hexagonal array exhibited a ~96% reduction in the intensity of the ?1 diffraction order. It is suggested natural moth-eye surfaces have evolved a tiled domain structure as it confers efficient antireflection whilst avoiding problems with high angle diffraction. This combination of antireflection and stealth properties increases chances of survival by reducing the risk of the insect being spotted by a predator. Furthermore, the tiled domain design could lead to more effective artificial moth-eye arrays for antiglare and stealth applications.

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e-pub ahead of print date: 2 January 2013
Published date: 14 January 2013
Organisations: Nanoelectronics and Nanotechnology, Electronics & Computer Science, Faculty of Physical Sciences and Engineering

Identifiers

Local EPrints ID: 353125
URI: https://eprints.soton.ac.uk/id/eprint/353125
ISSN: 1094-4087
PURE UUID: c49a9010-8e92-44dc-8e40-7168b2ba3684
ORCID for Stuart A. Boden: ORCID iD orcid.org/0000-0002-4232-1828

Catalogue record

Date deposited: 30 May 2013 13:02
Last modified: 21 Aug 2019 00:35

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Contributors

Author: Petros I. Stavroulakis
Author: Stuart A. Boden ORCID iD
Author: Thomas Johnson
Author: Darren M. Bagnall

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