Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser

B. N. Murdin; C. J.G.M. Langerak; M. Helm; P. Kruck; W. Heiss; V. Rosskopf; G. Strasser; E. Gornik; M. Dür; S. M. Goodnick; S. C. Lee; I. Galbraith; C. R. Pidgeon

doi:10.1006/spmi.1996.0003

Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser

B. N. Murdin, C. J.G.M. Langerak, M. Helm, P. Kruck, W. Heiss, V. Rosskopf, G. Strasser, E. Gornik, M. Dür, S. M. Goodnick, S. C. Lee, I. Galbraith, C. R. Pidgeon

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The problem of intersubband relaxation in GaAs/GaAs quantum wells, where the energy separation of the two lowest subbands is smaller than the optical phonon energy, is considered. Time resolved pump-and-probe measurements are performed with a far-infrared free-electron laser on two multiquantum well samples with similar thicknesses (≈300 Å), but different doping and mobilities. The measured lifetimes are shorter than could be explained by acoustic phonon emission alone. Monte-Carlo calculations show the importance of electron-electron scattering for thermalization of the hot electron distribution function and subsequent optical phonon emission from the long thermal tail.

Original language	English (US)
Pages (from-to)	17-24
Number of pages	8
Journal	Superlattices and Microstructures
Volume	19
Issue number	1
DOIs	https://doi.org/10.1006/spmi.1996.0003
State	Published - Jan 1996
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1006/spmi.1996.0003

Cite this

Murdin, B. N., Langerak, C. J. G. M., Helm, M., Kruck, P., Heiss, W., Rosskopf, V., Strasser, G., Gornik, E., Dür, M., Goodnick, S. M., Lee, S. C., Galbraith, I., & Pidgeon, C. R. (1996). Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser. Superlattices and Microstructures, 19(1), 17-24. https://doi.org/10.1006/spmi.1996.0003

Murdin, BN, Langerak, CJGM, Helm, M, Kruck, P, Heiss, W, Rosskopf, V, Strasser, G, Gornik, E, Dür, M, Goodnick, SM, Lee, SC, Galbraith, I & Pidgeon, CR 1996, 'Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser', Superlattices and Microstructures, vol. 19, no. 1, pp. 17-24. https://doi.org/10.1006/spmi.1996.0003

@article{85985ea04ab64827ad00744f3230fa3a,

title = "Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser",

abstract = "The problem of intersubband relaxation in GaAs/GaAs quantum wells, where the energy separation of the two lowest subbands is smaller than the optical phonon energy, is considered. Time resolved pump-and-probe measurements are performed with a far-infrared free-electron laser on two multiquantum well samples with similar thicknesses (≈300 {\AA}), but different doping and mobilities. The measured lifetimes are shorter than could be explained by acoustic phonon emission alone. Monte-Carlo calculations show the importance of electron-electron scattering for thermalization of the hot electron distribution function and subsequent optical phonon emission from the long thermal tail.",

author = "Murdin, {B. N.} and Langerak, {C. J.G.M.} and M. Helm and P. Kruck and W. Heiss and V. Rosskopf and G. Strasser and E. Gornik and M. D{\"u}r and Goodnick, {S. M.} and Lee, {S. C.} and I. Galbraith and Pidgeon, {C. R.}",

note = "Funding Information: Acknowledgements—We gratefully acknowledge the support by the Stichting voor Fundamenteel Onderzoek der Materie (FOM) in providing the required beamtime on FELIX and highly appreciate the skillful assistance by the FELIX staff, in particular Dr A. F. G. van der Meer. This work has been supported by the NWO, Netherlands and by the FWF, Austria. One of us (CJGML) is grateful for a research assistantship from SERC, UK.",

year = "1996",

month = jan,

doi = "10.1006/spmi.1996.0003",

language = "English (US)",

volume = "19",

pages = "17--24",

journal = "Superlattices and Microstructures",

issn = "0749-6036",

publisher = "Academic Press Inc.",

number = "1",

}

TY - JOUR

T1 - Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser

AU - Murdin, B. N.

AU - Langerak, C. J.G.M.

AU - Helm, M.

AU - Kruck, P.

AU - Heiss, W.

AU - Rosskopf, V.

AU - Strasser, G.

AU - Gornik, E.

AU - Dür, M.

AU - Goodnick, S. M.

AU - Lee, S. C.

AU - Galbraith, I.

AU - Pidgeon, C. R.

N1 - Funding Information: Acknowledgements—We gratefully acknowledge the support by the Stichting voor Fundamenteel Onderzoek der Materie (FOM) in providing the required beamtime on FELIX and highly appreciate the skillful assistance by the FELIX staff, in particular Dr A. F. G. van der Meer. This work has been supported by the NWO, Netherlands and by the FWF, Austria. One of us (CJGML) is grateful for a research assistantship from SERC, UK.

PY - 1996/1

Y1 - 1996/1

N2 - The problem of intersubband relaxation in GaAs/GaAs quantum wells, where the energy separation of the two lowest subbands is smaller than the optical phonon energy, is considered. Time resolved pump-and-probe measurements are performed with a far-infrared free-electron laser on two multiquantum well samples with similar thicknesses (≈300 Å), but different doping and mobilities. The measured lifetimes are shorter than could be explained by acoustic phonon emission alone. Monte-Carlo calculations show the importance of electron-electron scattering for thermalization of the hot electron distribution function and subsequent optical phonon emission from the long thermal tail.

AB - The problem of intersubband relaxation in GaAs/GaAs quantum wells, where the energy separation of the two lowest subbands is smaller than the optical phonon energy, is considered. Time resolved pump-and-probe measurements are performed with a far-infrared free-electron laser on two multiquantum well samples with similar thicknesses (≈300 Å), but different doping and mobilities. The measured lifetimes are shorter than could be explained by acoustic phonon emission alone. Monte-Carlo calculations show the importance of electron-electron scattering for thermalization of the hot electron distribution function and subsequent optical phonon emission from the long thermal tail.

UR - http://www.scopus.com/inward/record.url?scp=0029734432&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029734432&partnerID=8YFLogxK

U2 - 10.1006/spmi.1996.0003

DO - 10.1006/spmi.1996.0003

M3 - Article

AN - SCOPUS:0029734432

SN - 0749-6036

VL - 19

SP - 17

EP - 24

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

IS - 1

ER -

Time resolved studies of intersubband relaxation in GaAs/AlGaAs quantum wells below the optical phonon energy using a free electron laser

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this