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

doi:10.1063/1.110185

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

School of Engineering & Physical Sciences

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

24 Citations (Scopus)

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 language	English
Pages (from-to)	3315-3317
Number of pages	3
Journal	Applied Physics Letters
Volume	63
Issue number	24
DOIs	https://doi.org/10.1063/1.110185
Publication status	Published - 1993

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10.1063/1.110185

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@article{5642d5af93864feb80f518aa795c81d4,

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

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.\}",

year = "1993",

doi = "10.1063/1.110185",

language = "English",

volume = "63",

pages = "3315--3317",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "24",

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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

SN - 0003-6951

VL - 63

SP - 3315

EP - 3317

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 24

ER -

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

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