Dean, P, Valavanis, A, Keeley, J et al. (11 more authors) (2013) Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser. Applied Physics Letters, 103 (18). 181112. 181112-1 . ISSN 0003-6951
Abstract
We demonstrate coherent terahertz (THz) frequency imaging using the self-mixing effect in a quantum cascade laser (QCL). Self-mixing voltage waveforms are acquired at each pixel of a two-dimensional image of etched GaAs structures and fitted to a three-mirror laser model, enabling extraction of the amplitude and phase parameters of the reflected field. From the phase, we reconstruct the depth of the sample surface, and we show that the amplitude can be related to the sample reflectance. Our approach is experimentally simple and compact, and does not require frequency stabilization of the THz QCL.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013, AIP. Reproduced in accordance with the publisher's self-archiving policy. |
Keywords: | Quantum cascade lasers; Laser resonators; Terahertz imaging; Terahertz radiation; Coherence imaging; Feedback interferometry; Self-mixing |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 28 Nov 2013 14:21 |
Last Modified: | 30 Sep 2014 13:34 |
Published Version: | http://dx.doi.org/10.1063/1.4827886 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/1.4827886 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:76884 |