Time-resolved studies of gain dynamics in quantum cascade laser

Hyunyong Choi, Zong Kwei Wu, Theodore B. Norris, Tobias Gresch, Marcella Giovannini, Jérôme Faist, Laurent Diehl, Federico Capasso

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Time-resolved mid-infrared pump-probe measurements in an operating quantum cascade laser below and above threshold reveal gain recovery dynamics to be driven by transport through the quantum cascade structure with two components: relaxation within a stage on a sub-picosecond scale and transport between stages on a picosecond scale. The fast recovery corresponds to resonant tunneling from the injector ground state into the upper lasing state, and is found to be incoherent due to strong dephasing via intraband electron-electron scattering. The slower component corresponds to miniband superlattice transport. Both components have been studied as a function of bias and temperature.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B
Pages1437-1438
Number of pages2
DOIs
Publication statusPublished - 2007 Dec 1
Event28th International Conference on the Physics of Semiconductors, ICPS 2006 - Vienna, Austria
Duration: 2006 Jul 242006 Jul 28

Publication series

NameAIP Conference Proceedings
Volume893
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other28th International Conference on the Physics of Semiconductors, ICPS 2006
CountryAustria
CityVienna
Period06/7/2406/7/28

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Choi, H., Wu, Z. K., Norris, T. B., Gresch, T., Giovannini, M., Faist, J., Diehl, L., & Capasso, F. (2007). Time-resolved studies of gain dynamics in quantum cascade laser. In Physics of Semiconductors - 28th International Conference on the Physics of Semiconductors, ICPS 2006, Part A and B (pp. 1437-1438). (AIP Conference Proceedings; Vol. 893). https://doi.org/10.1063/1.2730446