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Phys. Rev. A 65, 063813 (2002) [12 pages]

Far-infrared laser action from quantum dots created by electric-field focusing

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Lucjan Jacak1, Jurij Krasnyj2 *, Dorota Jacak3, and Liliana Bujkiewicz1
1Institute of Physics, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50–370 Wrocław, Poland
2Institute of Mathematics, University of Opole, Oleska 48, Opole, Poland
3Institute of Mathematics, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50–370 Wrocław, Poland

Received 6 June 2001; revised 31 January 2002; published 13 June 2002

The proposal of a far-infrared laser employing intraband transitions in the system of quantum dots is presented. The model for electrically defined Gaussian quantum dots in a narrow Ga(Al)As quantum well is examined and the conditions for inversion of population of the dot matrix are discussed. The laser is planned to be pumped by periodically repeated rapid creation and destruction of the quantum dot matrix allowing for repeated filling of the dot levels with electrons from a quantum well. The kinetics of the electron-photon system is analyzed in order to determine the characteristics of the pumping signal and other laser parameters.


©2002 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.65.063813
DOI: 10.1103/PhysRevA.65.063813
PACS: 42.55.Px, 42.60.By, 73.21.-b, 85.35.Be

* On leave from Institute of Physics, Odessa University, Odessa, Ukraine.

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