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Reflectance properties of silicon moth-eyes in response to variations in angle of incidence, polarisation and azimuth orientation

Reflectance properties of silicon moth-eyes in response to variations in angle of incidence, polarisation and azimuth orientation
Reflectance properties of silicon moth-eyes in response to variations in angle of incidence, polarisation and azimuth orientation
We report a study of the optical properties of silicon moth-eye structures using a custom-made fully automated broadband spectroscopic reflectometry system (goniometer). This measurement system is able to measure specular reflectance as a function of wavelength, polar incidence angle and azimuth orientation angle, from normal to near-parallel polar incidence angle. The system uses a linear polarized broadband super-continuum laser light source. It is shown that a moth-eye structure composed of a regular array of protruding silicon rods, with finite sidewall angle reduces reflectance and sensitivity to incident wavelength in comparison to truly cylindrical rods with perpendicular sidewalls. It is also shown that moth-eye structures have omnidirectional reflectance properties in response to azimuth orientation of the sample. The importance of applying the reflectometer setup to study the optical properties of solar cell antireflective structures is highlighted.
1094-4087
a402-a415
Asadollahbaik, Asa
af3047e2-2925-44c5-8d8b-7cb12a1146ee
Boden, Stuart
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Charlton, M.D.B.
fcf86ab0-8f34-411a-b576-4f684e51e274
Payne, D.N.R.
c865ff8d-4639-4bf7-b923-fd61df48d4de
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55
Bagnall, D.M.
5d84abc8-77e5-43f7-97cb-e28533f25ef1
Asadollahbaik, Asa
af3047e2-2925-44c5-8d8b-7cb12a1146ee
Boden, Stuart
83976b65-e90f-42d1-9a01-fe9cfc571bf8
Charlton, M.D.B.
fcf86ab0-8f34-411a-b576-4f684e51e274
Payne, D.N.R.
c865ff8d-4639-4bf7-b923-fd61df48d4de
Cox, S.J.
0e62aaed-24ad-4a74-b996-f606e40e5c55
Bagnall, D.M.
5d84abc8-77e5-43f7-97cb-e28533f25ef1

Asadollahbaik, Asa, Boden, Stuart, Charlton, M.D.B., Payne, D.N.R., Cox, S.J. and Bagnall, D.M. (2014) Reflectance properties of silicon moth-eyes in response to variations in angle of incidence, polarisation and azimuth orientation. Optics Express, 22 (S2), a402-a415. (doi:10.1364/OE.22.00A402).

Record type: Article

Abstract

We report a study of the optical properties of silicon moth-eye structures using a custom-made fully automated broadband spectroscopic reflectometry system (goniometer). This measurement system is able to measure specular reflectance as a function of wavelength, polar incidence angle and azimuth orientation angle, from normal to near-parallel polar incidence angle. The system uses a linear polarized broadband super-continuum laser light source. It is shown that a moth-eye structure composed of a regular array of protruding silicon rods, with finite sidewall angle reduces reflectance and sensitivity to incident wavelength in comparison to truly cylindrical rods with perpendicular sidewalls. It is also shown that moth-eye structures have omnidirectional reflectance properties in response to azimuth orientation of the sample. The importance of applying the reflectometer setup to study the optical properties of solar cell antireflective structures is highlighted.

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More information

Accepted/In Press date: 9 February 2014
e-pub ahead of print date: 18 February 2014
Published date: 18 February 2014
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 362747
URI: https://eprints.soton.ac.uk/id/eprint/362747
ISSN: 1094-4087
PURE UUID: 6e9ebfbd-52a6-426a-a3d7-47a908ce413e
ORCID for Stuart Boden: ORCID iD orcid.org/0000-0002-4232-1828

Catalogue record

Date deposited: 05 Mar 2014 17:27
Last modified: 09 Jun 2018 00:33

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