Density matrix theory of transport and gain in quantum cascade lasers in a magnetic field

Savić, I., Vukmirović, N., Ikonić, Z., Indjin, D., Kelsall, R.W., Harrison, P. and Milanović, V. (2007) Density matrix theory of transport and gain in quantum cascade lasers in a magnetic field. Physical Review B, 76 (165310). ISSN 1550-235x

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Abstract

A density matrix theory of electron transport and optical gain in quantum cascade lasers in an external magnetic field is formulated. Starting from a general quantum kinetic treatment, we describe the intraperiod and interperiod electron dynamics at the non-Markovian, Markovian, and Boltzmann approximation levels. Interactions of electrons with longitudinal optical phonons and classical light fields are included in the present description. The non-Markovian calculation for a prototype structure reveals a significantly different gain spectra in terms of linewidth and additional polaronic features in comparison to the Markovian and Boltzmann ones. Despite strongly controversial interpretations of the origin of the transport processes in the non- Markovian or Markovian and the Boltzmann approaches, they yield comparable values of the current densities.

Item Type:	Article
Copyright, Publisher and Additional Information:	© 2007 by The American Physical Society
Academic Units:	The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User:	Sherpa Assistant
Date Deposited:	30 Oct 2007 10:41
Last Modified:	08 Feb 2013 17:05
Published Version:	http://dx.doi.org/10.1103/PhysRevB.76.165310
Status:	Published
Publisher:	The American Physical Society
Refereed:	Yes
Identification Number:	10.1103/PhysRevB.76.165310
URI:	http://eprints.whiterose.ac.uk/id/eprint/3433

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