Ultrafast coherent nonlinear dynamics of intersubband excitations in a quasi-two-dimensional electron gas

M. Woerner; R. A. Kaindl; F. Eickemeyer; K. Reimann; T. Elsaesser; R. Hey; K. Ploog

doi:10.1016/S1386-9477(02)00174-1

Ultrafast coherent nonlinear dynamics of intersubband excitations in a quasi-two-dimensional electron gas

M. Woerner, R. A. Kaindl, F. Eickemeyer, K. Reimann, T. Elsaesser, R. Hey, K. Ploog

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

Abstract

The ultrafast dynamics of coherent intersubband polarizations in n-type modulation-doped GaAs/AlGaAs quantum wells is studied by femtosecond time-integrated and time-resolved four-wave-mixing. At a low electron density of 5 × 10¹⁰ cm^-2, intraband Coulomb scattering results in irreversible dephasing with a decay time of T₂ = 320 fs which is independent of excitation density and fully accounts for the 3.7 meV linewidth of the intersubband transition. Nonlinear propagation of tailored mid-infrared field transients is studied using amplitude and phase-resolved detection. A coherent response corresponding to partial Rabi flops of up to 60° in the Bloch sphere is observed with excitation pulses of only 1 pJ energy.

Original language	English (US)
Pages (from-to)	477-480
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	13
Issue number	2-4
DOIs	https://doi.org/10.1016/S1386-9477(02)00174-1
State	Published - Mar 2002
Externally published	Yes

Keywords

Coherent polarization
Intersubband transitions
Quantum wells

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/S1386-9477(02)00174-1

Cite this

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title = "Ultrafast coherent nonlinear dynamics of intersubband excitations in a quasi-two-dimensional electron gas",

abstract = "The ultrafast dynamics of coherent intersubband polarizations in n-type modulation-doped GaAs/AlGaAs quantum wells is studied by femtosecond time-integrated and time-resolved four-wave-mixing. At a low electron density of 5 × 1010 cm-2, intraband Coulomb scattering results in irreversible dephasing with a decay time of T2 = 320 fs which is independent of excitation density and fully accounts for the 3.7 meV linewidth of the intersubband transition. Nonlinear propagation of tailored mid-infrared field transients is studied using amplitude and phase-resolved detection. A coherent response corresponding to partial Rabi flops of up to 60° in the Bloch sphere is observed with excitation pulses of only 1 pJ energy.",

keywords = "Coherent polarization, Intersubband transitions, Quantum wells",

author = "M. Woerner and Kaindl, {R. A.} and F. Eickemeyer and K. Reimann and T. Elsaesser and R. Hey and K. Ploog",

year = "2002",

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doi = "10.1016/S1386-9477(02)00174-1",

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volume = "13",

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T1 - Ultrafast coherent nonlinear dynamics of intersubband excitations in a quasi-two-dimensional electron gas

AU - Woerner, M.

AU - Kaindl, R. A.

AU - Eickemeyer, F.

AU - Reimann, K.

AU - Elsaesser, T.

AU - Hey, R.

AU - Ploog, K.

PY - 2002/3

Y1 - 2002/3

N2 - The ultrafast dynamics of coherent intersubband polarizations in n-type modulation-doped GaAs/AlGaAs quantum wells is studied by femtosecond time-integrated and time-resolved four-wave-mixing. At a low electron density of 5 × 1010 cm-2, intraband Coulomb scattering results in irreversible dephasing with a decay time of T2 = 320 fs which is independent of excitation density and fully accounts for the 3.7 meV linewidth of the intersubband transition. Nonlinear propagation of tailored mid-infrared field transients is studied using amplitude and phase-resolved detection. A coherent response corresponding to partial Rabi flops of up to 60° in the Bloch sphere is observed with excitation pulses of only 1 pJ energy.

AB - The ultrafast dynamics of coherent intersubband polarizations in n-type modulation-doped GaAs/AlGaAs quantum wells is studied by femtosecond time-integrated and time-resolved four-wave-mixing. At a low electron density of 5 × 1010 cm-2, intraband Coulomb scattering results in irreversible dephasing with a decay time of T2 = 320 fs which is independent of excitation density and fully accounts for the 3.7 meV linewidth of the intersubband transition. Nonlinear propagation of tailored mid-infrared field transients is studied using amplitude and phase-resolved detection. A coherent response corresponding to partial Rabi flops of up to 60° in the Bloch sphere is observed with excitation pulses of only 1 pJ energy.

KW - Coherent polarization

KW - Intersubband transitions

KW - Quantum wells

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DO - 10.1016/S1386-9477(02)00174-1

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JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 2-4

ER -

Ultrafast coherent nonlinear dynamics of intersubband excitations in a quasi-two-dimensional electron gas

Abstract

Keywords

ASJC Scopus subject areas

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