Complete bleaching of the intersubband absorption in GaAs/AlGaAs quantum wells using a far-infrared free-electron laser

M. Helm, T. Fromherz, B. N. Murdin, C. R. Pidgeon, K. K. Geerinck, N. J. Hovenyer, W. Th Wenckebach, A. F G Van Der Meer, P. W. Van Amersfoort

Research output: Contribution to journalArticle

Abstract

The intensity-dependent intersubband absorption in GaAs/AlGaAs quantum wells with a subband separation smaller than the optical phonon energy has been measured with a pulsed far-infrared free-electron laser. Complete bleaching of the absorption is observed at I=200 kW/cm2. Fitting the data with a two-level system yields a characteristic time constant of 1-2 ps. Possible interpretations, considering the finite pulse width of the laser, are discussed.

Original languageEnglish
Pages (from-to)3315-3317
Number of pages3
JournalApplied Physics Letters
Volume63
Issue number24
DOIs
Publication statusPublished - 1993

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bleaching
free electron lasers
infrared lasers
aluminum gallium arsenides
quantum wells
time constant
pulse duration
lasers
energy

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Helm, M., Fromherz, T., Murdin, B. N., Pidgeon, C. R., Geerinck, K. K., Hovenyer, N. J., ... Van Amersfoort, P. W. (1993). Complete bleaching of the intersubband absorption in GaAs/AlGaAs quantum wells using a far-infrared free-electron laser. Applied Physics Letters, 63(24), 3315-3317. https://doi.org/10.1063/1.110185
Helm, M. ; Fromherz, T. ; Murdin, B. N. ; Pidgeon, C. R. ; Geerinck, K. K. ; Hovenyer, N. J. ; Wenckebach, W. Th ; Van Der Meer, A. F G ; Van Amersfoort, P. W. / Complete bleaching of the intersubband absorption in GaAs/AlGaAs quantum wells using a far-infrared free-electron laser. In: Applied Physics Letters. 1993 ; Vol. 63, No. 24. pp. 3315-3317.
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abstract = "The intensity-dependent intersubband absorption in GaAs/AlGaAs quantum wells with a subband separation smaller than the optical phonon energy has been measured with a pulsed far-infrared free-electron laser. Complete bleaching of the absorption is observed at I=200 kW/cm2. Fitting the data with a two-level system yields a characteristic time constant of 1-2 ps. Possible interpretations, considering the finite pulse width of the laser, are discussed.",
author = "M. Helm and T. Fromherz and Murdin, {B. N.} and Pidgeon, {C. R.} and Geerinck, {K. K.} and Hovenyer, {N. J.} and Wenckebach, {W. Th} and {Van Der Meer}, {A. F G} and {Van Amersfoort}, {P. W.}",
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Helm, M, Fromherz, T, Murdin, BN, Pidgeon, CR, Geerinck, KK, Hovenyer, NJ, Wenckebach, WT, Van Der Meer, AFG & Van Amersfoort, PW 1993, 'Complete bleaching of the intersubband absorption in GaAs/AlGaAs quantum wells using a far-infrared free-electron laser', Applied Physics Letters, vol. 63, no. 24, pp. 3315-3317. https://doi.org/10.1063/1.110185

Complete bleaching of the intersubband absorption in GaAs/AlGaAs quantum wells using a far-infrared free-electron laser. / Helm, M.; Fromherz, T.; Murdin, B. N.; Pidgeon, C. R.; Geerinck, K. K.; Hovenyer, N. J.; Wenckebach, W. Th; Van Der Meer, A. F G; Van Amersfoort, P. W.

In: Applied Physics Letters, Vol. 63, No. 24, 1993, p. 3315-3317.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Complete bleaching of the intersubband absorption in GaAs/AlGaAs quantum wells using a far-infrared free-electron laser

AU - Helm, M.

AU - Fromherz, T.

AU - Murdin, B. N.

AU - Pidgeon, C. R.

AU - Geerinck, K. K.

AU - Hovenyer, N. J.

AU - Wenckebach, W. Th

AU - Van Der Meer, A. F G

AU - Van Amersfoort, P. W.

PY - 1993

Y1 - 1993

N2 - The intensity-dependent intersubband absorption in GaAs/AlGaAs quantum wells with a subband separation smaller than the optical phonon energy has been measured with a pulsed far-infrared free-electron laser. Complete bleaching of the absorption is observed at I=200 kW/cm2. Fitting the data with a two-level system yields a characteristic time constant of 1-2 ps. Possible interpretations, considering the finite pulse width of the laser, are discussed.

AB - The intensity-dependent intersubband absorption in GaAs/AlGaAs quantum wells with a subband separation smaller than the optical phonon energy has been measured with a pulsed far-infrared free-electron laser. Complete bleaching of the absorption is observed at I=200 kW/cm2. Fitting the data with a two-level system yields a characteristic time constant of 1-2 ps. Possible interpretations, considering the finite pulse width of the laser, are discussed.

U2 - 10.1063/1.110185

DO - 10.1063/1.110185

M3 - Article

VL - 63

SP - 3315

EP - 3317

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 24

ER -