International Journal of Terahertz Science and Technology
  TST >> Vol.1, No.1, March 2008: PP. 22-27
 

Terahertz frequency quantum cascade lasers: growth and measurement

S. P. Khanna 1* , S. Chakraborty 2 , M. Lachab 1, N. M. Hinchcliffe 1 , P. Dean 1 , E. H. Linfield 1 , and A. G. Davies 1
1 School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom.
2 School of Electrical and Electronic Engineering, University of Manchester,
Manchester M60 1QD, United Kingdom.
*1 Email: s.p.khanna03@leeds.ac.uk

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Abstract: Results are presented for two GaAs-AlGaAs quantum cascade laser (QCL) structures that emit at frequencies of 2.59 THz and 2.75 THz. Both structures have a nominally identical, bound-to-continuum active region design, and the difference between their emission frequencies is interpreted as resulting from small differences in the gallium and aluminium growth rates, which were measured both before and after laser growth using a pyrometric spectrometry technique. The same technique allows the QCL growth to be monitored real-time, and drifts in growth rates identified.

Keywords: Terahertz，Quantum cascade lasers

Published: 2008-03-18

Cite this article:
S. P. Khanna, S. Chakraborty, M. Lachab, N. M. Hinchcliffe, P. Dean, E. H. Linfield, and A. G. Davies. Terahertz frequency quantum cascade lasers: growth and measurement[J]. International Journal of Terahertz Science and Technology, 2008, Vol.1, No.1: 22-27.   DOI:10.11906/TST.022-027.2008.03.03

URL: http://www.tstnetwork.org/10.11906/TST.022-027.2008.03.03

 
 
 

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