Journal
PHYSICS LETTERS A
Volume 378, Issue 30-31, Pages 2222-2225Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2014.04.069
Keywords
Conduction band nonparabolicity; Quantum wells; Quantum cascade laser
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Funding
- Ministry of Education, Science and Technological Development (Republic of Serbia) [III 45010]
- NATO Science for Peace Program [SfP 984068]
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We analyze the influence of nonparabolicity on the bound electronic states in the conduction-band of quantum wells in external electric field. Numerical results, obtained by transfer matrix method are presented for active region of GaAs/Al0.3Ga0.7As quantum cascade laser. The structure was initially optimized by genetic algorithm, using Kane's model of nonparabolicity, with emission wavelength set to lambda approximate to 15.1 mu m. However, our numerical results indicate the change in lasing wavelength to 14.04 mu m when using a more comprehensive description of nonparabolicity. (C) 2014 Elsevier B.V. All rights reserved.
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