Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers

Hyunyong Choi, Theodore B. Norris, Tobias Gresch, Marcella Giovannini, J́rôme Faist, Laurent Diehl, Federico Capasso

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Time-resolved mid-infrared pump-probe measurements are performed on a quantum cascade laser below and above the threshold. The gain recovery is determined by the electron transport through the cascade heterostructure. Subpicosecond resonant tunneling injection from the injector ground state into the upper lasing state is found to be incoherent due to the strong dephasing in the active subband. The gain recovery due to transport through superlattice is interpreted in terms of dielectric relaxation within the superlattice miniband.

Original languageEnglish
Article number122114
JournalApplied Physics Letters
Volume92
Issue number12
DOIs
Publication statusPublished - 2008 Apr 3

Fingerprint

quantum cascade lasers
resonant tunneling
recovery
injectors
lasing
cascades
pumps
injection
ground state
thresholds
probes
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Choi, H., Norris, T. B., Gresch, T., Giovannini, M., Faist, J., Diehl, L., & Capasso, F. (2008). Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers. Applied Physics Letters, 92(12), [122114]. https://doi.org/10.1063/1.2898518
Choi, Hyunyong ; Norris, Theodore B. ; Gresch, Tobias ; Giovannini, Marcella ; Faist, J́rôme ; Diehl, Laurent ; Capasso, Federico. / Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers. In: Applied Physics Letters. 2008 ; Vol. 92, No. 12.
@article{72abcec9fc5340659a41697ba0d41a8e,
title = "Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers",
abstract = "Time-resolved mid-infrared pump-probe measurements are performed on a quantum cascade laser below and above the threshold. The gain recovery is determined by the electron transport through the cascade heterostructure. Subpicosecond resonant tunneling injection from the injector ground state into the upper lasing state is found to be incoherent due to the strong dephasing in the active subband. The gain recovery due to transport through superlattice is interpreted in terms of dielectric relaxation within the superlattice miniband.",
author = "Hyunyong Choi and Norris, {Theodore B.} and Tobias Gresch and Marcella Giovannini and J́r{\^o}me Faist and Laurent Diehl and Federico Capasso",
year = "2008",
month = "4",
day = "3",
doi = "10.1063/1.2898518",
language = "English",
volume = "92",
journal = "Applied Physics Letters",
issn = "0003-6951",
publisher = "American Institute of Physics Publising LLC",
number = "12",

}

Choi, H, Norris, TB, Gresch, T, Giovannini, M, Faist, J, Diehl, L & Capasso, F 2008, 'Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers', Applied Physics Letters, vol. 92, no. 12, 122114. https://doi.org/10.1063/1.2898518

Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers. / Choi, Hyunyong; Norris, Theodore B.; Gresch, Tobias; Giovannini, Marcella; Faist, J́rôme; Diehl, Laurent; Capasso, Federico.

In: Applied Physics Letters, Vol. 92, No. 12, 122114, 03.04.2008.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers

AU - Choi, Hyunyong

AU - Norris, Theodore B.

AU - Gresch, Tobias

AU - Giovannini, Marcella

AU - Faist, J́rôme

AU - Diehl, Laurent

AU - Capasso, Federico

PY - 2008/4/3

Y1 - 2008/4/3

N2 - Time-resolved mid-infrared pump-probe measurements are performed on a quantum cascade laser below and above the threshold. The gain recovery is determined by the electron transport through the cascade heterostructure. Subpicosecond resonant tunneling injection from the injector ground state into the upper lasing state is found to be incoherent due to the strong dephasing in the active subband. The gain recovery due to transport through superlattice is interpreted in terms of dielectric relaxation within the superlattice miniband.

AB - Time-resolved mid-infrared pump-probe measurements are performed on a quantum cascade laser below and above the threshold. The gain recovery is determined by the electron transport through the cascade heterostructure. Subpicosecond resonant tunneling injection from the injector ground state into the upper lasing state is found to be incoherent due to the strong dephasing in the active subband. The gain recovery due to transport through superlattice is interpreted in terms of dielectric relaxation within the superlattice miniband.

UR - http://www.scopus.com/inward/record.url?scp=41349100905&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=41349100905&partnerID=8YFLogxK

U2 - 10.1063/1.2898518

DO - 10.1063/1.2898518

M3 - Article

AN - SCOPUS:41349100905

VL - 92

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 12

M1 - 122114

ER -