Ultrafast dynamics of nonlinear intersubband absorption in n-type modulation doped GaInAs/AlInAs quantum wells

R. A. Kaindl; S. Lutgen; M. Woerner; T. Elsaesser; A. Hase; H. Künzel

doi:10.1002/1521-3951(199711)204:1<212::AID-PSSB212>3.0.CO;2-M

Ultrafast dynamics of nonlinear intersubband absorption in n-type modulation doped GaInAs/AlInAs quantum wells

R. A. Kaindl, S. Lutgen, M. Woerner, T. Elsaesser, A. Hase, H. Künzel

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

Abstract

The nonlinear intersubband absorption of a quasi-two-dimensional electron plasma in n-type modulation doped Ga_0.47In_0.53As/Al_0.48In_0.52As multiple quantum wells is investigated by femtosecond pump-probe measurements in the mid-infrared. We observe a strong dependence of the transient nonlinear intersubband absorption on the spectral position of the pulses within the intersubband absorption line. The time-resolved measurements demonstrate that the absorption dynamics is determined not only by intersubband relaxation with a time constant of 1.3 ps but also by the intrasubband thermalization and subsequent cooling of the n = 1 electron distribution.

Original language	English (US)
Pages (from-to)	212-214
Number of pages	3
Journal	Physica Status Solidi (B) Basic Research
Volume	204
Issue number	1
DOIs	https://doi.org/10.1002/1521-3951(199711)204:1<212::AID-PSSB212>3.0.CO;2-M
State	Published - Nov 1997
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1002/1521-3951(199711)204:1<212::AID-PSSB212>3.0.CO;2-M

Cite this

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title = "Ultrafast dynamics of nonlinear intersubband absorption in n-type modulation doped GaInAs/AlInAs quantum wells",

abstract = "The nonlinear intersubband absorption of a quasi-two-dimensional electron plasma in n-type modulation doped Ga0.47In0.53As/Al0.48In0.52As multiple quantum wells is investigated by femtosecond pump-probe measurements in the mid-infrared. We observe a strong dependence of the transient nonlinear intersubband absorption on the spectral position of the pulses within the intersubband absorption line. The time-resolved measurements demonstrate that the absorption dynamics is determined not only by intersubband relaxation with a time constant of 1.3 ps but also by the intrasubband thermalization and subsequent cooling of the n = 1 electron distribution.",

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year = "1997",

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T1 - Ultrafast dynamics of nonlinear intersubband absorption in n-type modulation doped GaInAs/AlInAs quantum wells

AU - Kaindl, R. A.

AU - Lutgen, S.

AU - Woerner, M.

AU - Elsaesser, T.

AU - Hase, A.

AU - Künzel, H.

PY - 1997/11

Y1 - 1997/11

N2 - The nonlinear intersubband absorption of a quasi-two-dimensional electron plasma in n-type modulation doped Ga0.47In0.53As/Al0.48In0.52As multiple quantum wells is investigated by femtosecond pump-probe measurements in the mid-infrared. We observe a strong dependence of the transient nonlinear intersubband absorption on the spectral position of the pulses within the intersubband absorption line. The time-resolved measurements demonstrate that the absorption dynamics is determined not only by intersubband relaxation with a time constant of 1.3 ps but also by the intrasubband thermalization and subsequent cooling of the n = 1 electron distribution.

AB - The nonlinear intersubband absorption of a quasi-two-dimensional electron plasma in n-type modulation doped Ga0.47In0.53As/Al0.48In0.52As multiple quantum wells is investigated by femtosecond pump-probe measurements in the mid-infrared. We observe a strong dependence of the transient nonlinear intersubband absorption on the spectral position of the pulses within the intersubband absorption line. The time-resolved measurements demonstrate that the absorption dynamics is determined not only by intersubband relaxation with a time constant of 1.3 ps but also by the intrasubband thermalization and subsequent cooling of the n = 1 electron distribution.

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Ultrafast dynamics of nonlinear intersubband absorption in n-type modulation doped GaInAs/AlInAs quantum wells

Abstract

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