Self-Consistent Theory of the Gain Linewidth for Quantum Cascade Lasers

Details Self-Consistent Theory of the Gain Linewidth for Quantum Cascade Lasers Self-Consistent Theory of the Gain Linewidth for Quantum Cascade Lasers

2004-10-19

arxiv.org/abs/cond-mat/0410476v2

Applied Physics Letters 86, 041108 (2005)

Physics

Condensed Matter

Other Condensed Matter

3 pages, figures included

Scientific paper

10.1063/1.1851004

The linewidth in intersubband transitions can be significantly reduced below
the sum of the lifetime broadening for the involved states, if the scattering
environment is similar for both states. This is studied within a nonequilibrium
Green function approach here. We find that the effect is of particular
relevance for a recent, relatively low doped, THz quantum cascade laser.

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