Vukmirovic, N., Indjin, D., Ikonic, Z. and Harrison, P. (2008) Electron transport and terahertz gain in quantum-dot cascades. IEEE Photonics Technology Letters, 20 (2). pp. 129-131. ISSN 10411135Full text available as:
Available under licence : See the attached licence file.
Electron transport through quantum-dot (QD) cascades was investigated using the formalism of nonequilibrium Green's functions within the self-consistent Born approximation. Polar coupling to optical phonons, deformation potential coupling to acoustic phonons, as well as anharmonic decay of longitudinal optical phonons were included in the simulation. A QD cascade laser structure comprising two QDs per period was designed and its characteristics were simulated. Significant values of population inversion enabling lasing in the terahertz frequency range were predicted, with operating current densities being more than an order of magnitude smaller than in existing terahertz quantum-well-based quantum-cascade lasers.
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|Institution:||The University of Leeds|
|Academic Units:||The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)|
|Depositing User:||Repository Officer|
|Date Deposited:||10 Mar 2009 17:06|
|Last Modified:||08 Jun 2014 13:21|