Subthreshold carrier-LO phonon dynamics in semiconductors with intermediate polaron coupling: A purely quantum kinetic relaxation channel

M. Betz; G. Göger; A. Laubereau; P. Gartner; L. Bányai; H. Haug; K. Ortner; C. R. Becker; A. Leitenstorfer

doi:10.1103/PhysRevLett.86.4684

Subthreshold carrier-LO phonon dynamics in semiconductors with intermediate polaron coupling: A purely quantum kinetic relaxation channel

M. Betz, G. Göger, A. Laubereau, P. Gartner, L. Bányai, H. Haug, K. Ortner, C. R. Becker, A. Leitenstorfer

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Abstract

Quantum kinetics based on the Dyson equation was used to compare the femtosecond transmission spectra of highly polar CdTe to covalent GaAs contrasting semiclassical kinetics. Due to the Frohlich mechanism, the nonequilibrium heavy holes in CdTe show ultrafast energy redistribution. The subthreshold relaxation is important if the polaron self-energy is comparable to the phonon energy and the conservation of free particle energies is not required.

Original language	English
Pages (from-to)	4684-4687
Number of pages	4
Journal	Physical Review Letters
Volume	86
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.86.4684
State	Published - 14 May 2001

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10.1103/PhysRevLett.86.4684

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abstract = "Quantum kinetics based on the Dyson equation was used to compare the femtosecond transmission spectra of highly polar CdTe to covalent GaAs contrasting semiclassical kinetics. Due to the Frohlich mechanism, the nonequilibrium heavy holes in CdTe show ultrafast energy redistribution. The subthreshold relaxation is important if the polaron self-energy is comparable to the phonon energy and the conservation of free particle energies is not required.",

author = "M. Betz and G. G{\"o}ger and A. Laubereau and P. Gartner and L. B{\'a}nyai and H. Haug and K. Ortner and Becker, {C. R.} and A. Leitenstorfer",

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T2 - A purely quantum kinetic relaxation channel

AU - Betz, M.

AU - Göger, G.

AU - Laubereau, A.

AU - Gartner, P.

AU - Bányai, L.

AU - Haug, H.

AU - Ortner, K.

AU - Becker, C. R.

AU - Leitenstorfer, A.

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Y1 - 2001/5/14

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AB - Quantum kinetics based on the Dyson equation was used to compare the femtosecond transmission spectra of highly polar CdTe to covalent GaAs contrasting semiclassical kinetics. Due to the Frohlich mechanism, the nonequilibrium heavy holes in CdTe show ultrafast energy redistribution. The subthreshold relaxation is important if the polaron self-energy is comparable to the phonon energy and the conservation of free particle energies is not required.

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Subthreshold carrier-LO phonon dynamics in semiconductors with intermediate polaron coupling: A purely quantum kinetic relaxation channel

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