THz QCL self-mixing interferometry for biomedical applications

Rakić, Aleksandar, Taimre, Thomas, Bertling, Karl, Lim, Yah Leng, Wilson, Stephen J., Nikolić, Milan, Valavanis, Alexander, Indjin, Dragan, Linfield, Edmund H., Davies, A. Giles, Ferguson, Blake, Walker, Graeme, Schaider, Helmut and Soyer, H. Peter (2014). THz QCL self-mixing interferometry for biomedical applications. In: Manijeh Razeghi, Alexei N. Baranov, John M. Zavada and Dimitris Pavlidis, Terahertz Emitters, Receivers, and Applications V. SPIE Optical Engineering + Applications Conference 2014, San Diego, United States, (91990M-1-91990M-12). 17-21 August 2014. doi:10.1117/12.2061433

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Author Rakić, Aleksandar
Taimre, Thomas
Bertling, Karl
Lim, Yah Leng
Wilson, Stephen J.
Nikolić, Milan
Valavanis, Alexander
Indjin, Dragan
Linfield, Edmund H.
Davies, A. Giles
Ferguson, Blake
Walker, Graeme
Schaider, Helmut
Soyer, H. Peter
Title of paper THz QCL self-mixing interferometry for biomedical applications
Conference name SPIE Optical Engineering + Applications Conference 2014
Conference location San Diego, United States
Conference dates 17-21 August 2014
Proceedings title Terahertz Emitters, Receivers, and Applications V   Check publisher's open access policy
Journal name Proceedings of SPIE   Check publisher's open access policy
Place of Publication Bellingham, WA, United States
Publisher S P I E - International Society for Optical Engineering
Publication Year 2014
Sub-type Fully published paper
DOI 10.1117/12.2061433
Open Access Status File (Publisher version)
ISBN 9781628412260
ISSN 0277-786X
Editor Manijeh Razeghi
Alexei N. Baranov
John M. Zavada
Dimitris Pavlidis
Volume 9199
Start page 91990M-1
End page 91990M-12
Total pages 12
Collection year 2015
Language eng
Formatted Abstract/Summary
In this paper, we introduce the self-mixing phenomenon in terahertz quantum cascade lasers (THz QCLs) and present recent advancements in the development of coherent THz imaging and sensing systems that exploit the self-mixing effect. We describe an imaging method which utilises the interferometric nature of optical feedback in a THz QCL to employ it as a homodyning transceiver. This results in a highly sensitive and compact scheme. Due to the inherently low penetration depth of THz radiation in hydrated biological tissue, imaging of superficial skin is an ideal application for this technique. We present results for imaging of excised skin tissue, showing high-contrast between different tissue types and pathologies.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes "Invited Paper".

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Created: Thu, 11 Sep 2014, 20:11:37 EST by Karl Bertling on behalf of School of Information Technol and Elec Engineering