Self-consistent analysis of carrier-transport and carrier-capture dynamics in quantum cascade intersubband semiconductor lasers

Author

Kálna, K. ; Cheung, C.Y.L. ; Pierce, I. ; Shore, K.A.

Author_Institution

Inst. of Electr. Eng., Slovak Acad. of Sci., Bratislava, Slovakia

Volume

48

Issue

4

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

639

Lastpage

644

Abstract

A methodology for the self-consistent analysis of carrier transport and carrier capture aspects of the dynamics of quantum cascade intersubband semiconductor lasers is described in this paper. The approach is used to analyze two prototype quantum cascade lasers. The self-consistent analysis incorporates the calculation of the electron densities and temperatures in each subband, together with the intersubband relaxation time. In the calculation of the relaxation time, we take into account the electron interaction with polar optical and acoustic phonons, as well as electron degeneracy. In addition, we also calculate the capture time, considering backward processes that play a role in the electron transition from an injection into an active region. The calculations indicate intersubband relaxation times of order 1 ps and capture times of order 100 fs

Keywords

carrier relaxation time; laser theory; quantum well lasers; carrier capture dynamics; carrier transport; electron degeneracy; electron density; electron temperature; electron transition; electron-phonon interaction; intersubband relaxation time; quantum cascade intersubband semiconductor laser; self-consistent analysis; Bandwidth; Charge carrier lifetime; Electrons; Equations; Laser modes; Laser theory; Laser transitions; Pump lasers; Quantum cascade lasers; Semiconductor lasers;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.841954

Filename

841954