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

fYear

2012

fDate

23-28 Sept. 2012

Firstpage

1

Lastpage

2

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on

Conference_Location

Wollongong, NSW

ISSN

2162-2027

Print_ISBN

978-1-4673-1598-2

Electronic_ISBN

2162-2027

Type

conf

DOI

10.1109/IRMMW-THz.2012.6380338

Filename

6380338