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Terahertz imaging through self-mixing in a quantum cascade laser

Dean, P, Lim, Y, Valavanis, A, Kliese, R, Nikolic, M, Khanna, SP, Lachab, M, Indjin, D, Ikonic, Z, Harrison, P, Rakic, A, Linfield, EH and Davies, AG (2011) Terahertz imaging through self-mixing in a quantum cascade laser. Optics Letters, 36 (13). 2587 - 2589 . ISSN 1539-4794

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We demonstrate terahertz (THz) frequency imaging through use of a single quantum cascade laser (QCL) device for both generation and sensing of THz radiation. Detection is achieved by utilising the effect of self-mixing in the QCL, and specifically by monitoring perturbations to the voltage across the QCL induced by light reflected from an external object back into the laser cavity. Self-mixing imaging offers high sensitivity, a potentially fast response, and a simple, compact optical design, and we show that it can be used to obtain high-resolution reflection images of exemplar structures.

Item Type: Article
Keywords: Semiconductor lasers, Far infrared or terahertz, Terahertz imaging, Semiconductor lasers
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User: Symplectic Publications
Date Deposited: 05 Jul 2011 10:38
Last Modified: 06 Jun 2014 18:47
Published Version: http://dx.doi.org/10.1364/OL.36.002587
Status: Published
Publisher: Optical Society of America
Identification Number: 10.1364/OL.36.002587
URI: http://eprints.whiterose.ac.uk/id/eprint/43114

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