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Proceedings Paper

Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
Author(s): Aleksandar D. Rakić; Yah Leng Lim; Thomas Taimre; Gary Agnew; Xiaoqiong Qi; Karl Bertling; She Han; Stephen J. Wilson; Iman Kundu; Andrew Grier; Zoran Ikonić; Alexander Valavanis; Aleksandar Demić; James Keeley; Lianhe H. Li; Edmund H. Linfield; A. Giles Davies; Paul Harrison; Blake Ferguson; Graeme Walker; Tarl Prow; Dragan Indjin; H. Peter Soyer
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Paper Abstract

Terahertz (THz) quantum cascade lasers (QCLs) are compact sources of radiation in the 1–5 THz range with significant potential for applications in sensing and imaging. Laser feedback interferometry (LFI) with THz QCLs is a technique utilizing the sensitivity of the QCL to the radiation reflected back into the laser cavity from an external target. We will discuss modelling techniques and explore the applications of LFI in biological tissue imaging and will show that the confocal nature of the QCL in LFI systems, with their innate capacity for depth sectioning, makes them suitable for skin diagnostics with the well-known advantages of more conventional confocal microscopes. A demonstration of discrimination of neoplasia from healthy tissue using a THz, LFI-based system in the context of melanoma is presented using a transgenic mouse model.

Paper Details

Date Published: 8 December 2016
PDF: 12 pages
Proc. SPIE 10030, Infrared, Millimeter-Wave, and Terahertz Technologies IV, 1003016 (8 December 2016); doi: 10.1117/12.2250621
Show Author Affiliations
Aleksandar D. Rakić, The Univ. of Queensland (Australia)
Yah Leng Lim, The Univ. of Queensland (Australia)
Thomas Taimre, The Univ. of Queensland (Australia)
Gary Agnew, The Univ. of Queensland (Australia)
Xiaoqiong Qi, The Univ. of Queensland (Australia)
Karl Bertling, The Univ. of Queensland (Australia)
She Han, The Univ. of Queensland (Australia)
Stephen J. Wilson, The Univ. of Queensland (Australia)
Iman Kundu, Univ. of Leeds (United Kingdom)
Andrew Grier, Univ. of Leeds (United Kingdom)
Zoran Ikonić, Univ. of Leeds (United Kingdom)
Alexander Valavanis, Univ. of Leeds (United Kingdom)
Aleksandar Demić, Univ. of Leeds (United Kingdom)
James Keeley, Univ. of Leeds (United Kingdom)
Lianhe H. Li, Univ. of Leeds (United Kingdom)
Edmund H. Linfield, Univ. of Leeds (United Kingdom)
A. Giles Davies, Univ. of Leeds (United Kingdom)
Paul Harrison, Sheffield Hallam Univ. (United Kingdom)
Blake Ferguson, QIMR Berghofer Medical Research Institute (Australia)
Graeme Walker, QIMR Berghofer Medical Research Institute (Australia)
Tarl Prow, The Univ. of Queensland (Australia)
Dragan Indjin, Univ. of Leeds (United Kingdom)
H. Peter Soyer, The Univ. of Queensland (Australia)

Published in SPIE Proceedings Vol. 10030:
Infrared, Millimeter-Wave, and Terahertz Technologies IV
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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