Detection of terahertz frequency radiation via the photothermoelastic response of zincblende crystals
Dean, P, Awang, AH, Kundu, I et al. (6 more authors)
(2013)
Detection of terahertz frequency radiation via the photothermoelastic response of zincblende crystals.
Journal of the Optical Society of America B, 30 (12).
12.
3151 - 3160.
ISSN 0740-3224
Abstract
We present experimental evidence for a photothermoelastic response in zincblende crystals illuminated by quantum cascade laser sources in the frequency range 2.2–2.9 THz. Results obtained using an optically balanced sampling arrangement indicate a mechanism whereby the stress distribution established through localized heating of the crystal induces a change in optical birefringence via the photoelastic response of the crystal. A full mathematic model of this photothermoelastic mechanism in (110)-orientated crystals is presented, and shown to agree well with experimental measurements of the magnitude, and the orientational and spatial dependencies of the sampled signal in ZnTe and GaP crystals.
Metadata
Authors/Creators:
Dean, P
Awang, AH
Kundu, I
Alhathlool, R
Khanna, SP
Li, LH
Burnett, A
Linfield, EH
Davies, AG
Copyright, Publisher and Additional Information:
(c) 2013, Optical Society of America. This is an author produced version of a paper published in Journal of the Optical Society of America B. Uploaded in accordance with the publisher's self-archiving policy.
This paper was published in Journal of the Optical Society of America B and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/JOSAB.30.003151. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Keywords:
Anisotropic optical materials; photothermal effects; far infrared or terahertz; semiconductor lasers; quantum cascade
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