The role of temperature in quantum-cascade laser waveguides

Craig A. Evans, Dragan Indjin, Zoran Ikonić, Paul Harrison

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


The role of temperature on the properties of quantum-cascade laser (QCL) waveguides is investigated. One-dimensional waveguide parameters are obtained using a transfer-matrix technique and the complex dielectric constants of the waveguide layers are calculated using a semi-classical Drude-Lorentz model. To model the effect of temperature on the waveguide parameters, a temperature dependent electron mobility is incorporated within the Drude- Lorentz framework. It is shown that by including the effect of temperature, a significant improvement in the agreement with experiment of the waveguide loss and hence the laser threshold current density can be achieved.

Original languageEnglish
Pages (from-to)137-143
Number of pages7
JournalJournal of Computational Electronics
Issue number1
Early online date7 Mar 2012
Publication statusPublished - 7 Mar 2012
Externally publishedYes


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