Title :
Thermo-optic detection of quantum cascade laser radiation in the range ∼2.2–2.9THz using a ZnTe crystal
Author :
Dean, P. ; Awang, A.H. ; Alhathlool, Raed ; Kundu, I. ; Khanna, Suraj P. ; Li, L.H. ; Linfield, Edmund H. ; Davies, A. Giles
Author_Institution :
Sch. of Electron. & Electr. Eng., Univ. of Leeds, Leeds, UK
Abstract :
We have investigated the thermo-optical (TO) response of a ZnTe crystal to THz QCL radiation in the frequency range ~2.2-2.9 THz. The TO response was investigated for variations in driving current, QCL polarisation direction and pulse modulation frequency. We show that the anisotropy of the TO coefficients should be taken into account to correctly describe the experimental response.
Keywords :
II-VI semiconductors; light polarisation; microwave photonics; optical modulation; pulse modulation; quantum cascade lasers; terahertz wave detectors; thermo-optical devices; thermo-optical effects; zinc compounds; QCL polarisation direction; THz QCL radiation; TO coefficients; ZnTe; driving current; frequency 2.2 THz to 2.9 THz; pulse modulation frequency; quantum cascade laser radiation; thermo-optic detection; thermo-optical response; Anisotropic magnetoresistance; Crystals; Frequency measurement; Frequency modulation; Quantum cascade lasers; Temperature measurement;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380338
