Journal
OPTICS LETTERS
Volume 36, Issue 13, Pages 2587-2589Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.002587
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Funding
- European Research Council (ERC)
- Terahertz Optoelectronics from the Science of Cascades to Applications (TOSCA)
- Innovative Research Call in Explosives and Weapons Detection
- Australian Research Council [DP0988072]
- Australian Research Council [DP0988072] Funding Source: Australian Research Council
- EPSRC [EP/J002356/1, EP/E048811/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E048811/1] Funding Source: researchfish
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We demonstrate terahertz (THz) frequency imaging using a single quantum cascade laser (QCL) device for both generation and sensing of THz radiation. Detection is achieved by utilizing the effect of self-mixing in the THz 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. (C) 2011 Optical Society of America
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