title: Terahertz imaging through self-mixing in a quantum cascade laser.
abstract: 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.
authors: School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, UK. p.dean@leeds.ac.uk
authors: Paul
authors: P
authors: Dean
authors: Yah Leng
authors: YL
authors: Lim
authors: Alex
authors: A
authors: Valavanis
authors: Russell
authors: R
authors: Kliese
authors: Milan
authors: M
authors: Nikolić
authors: Suraj P
authors: SP
authors: Khanna
authors: Mohammad
authors: M
authors: Lachab
authors: Dragan
authors: D
authors: Indjin
authors: Zoran
authors: Z
authors: Ikonić
authors: Paul
authors: P
authors: Harrison
authors: Aleksandar D
authors: AD
authors: Rakić
authors: Edmund H
authors: EH
authors: Linfield
authors: A Giles
authors: AG
authors: Davies