Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser

Dean, Paul, Valavanis, Alex, Keeley, James, Bertling, Karl, Lim, Yah Leng, Alhathlool, Raed, Chowdhury, Siddhant, Taimre, Thomas, Li, Lianhe H., Indjin, Dragan, Wilson, Stephen J., Rakić, Aleksandar, Linfield, Edmund H. and Davies, A. Giles (2013) Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser. Applied Physics Letters, 103 18: 181112.1-181112.4. doi:10.1063/1.4827886

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Author Dean, Paul
Valavanis, Alex
Keeley, James
Bertling, Karl
Lim, Yah Leng
Alhathlool, Raed
Chowdhury, Siddhant
Taimre, Thomas
Li, Lianhe H.
Indjin, Dragan
Wilson, Stephen J.
Rakić, Aleksandar
Linfield, Edmund H.
Davies, A. Giles
Title Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
1077-3118
1520-8842
Publication date 2013-10-28
Sub-type Article (original research)
DOI 10.1063/1.4827886
Open Access Status File (Publisher version)
Volume 103
Issue 18
Start page 181112.1
End page 181112.4
Total pages 4
Place of publication College Park, MD, United States
Publisher American Institute of Physics
Collection year 2014
Language eng
Formatted 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.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2014 Collection
School of Information Technology and Electrical Engineering Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 21 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 19 times in Scopus Article | Citations
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Created: Thu, 31 Oct 2013, 07:33:23 EST by Karl Bertling on behalf of School of Information Technol and Elec Engineering