The effects of photoexcited free carriers on exciton dynamics in GaAs/AlGaAs quantum wells

B. M. Ashkinadze; E. Cohen; Arza Ron; E. Linder; L. N. Pfeiffer

doi:10.1006/spmi.1994.1036

The effects of photoexcited free carriers on exciton dynamics in GaAs/AlGaAs quantum wells

B. M. Ashkinadze, E. Cohen, Arza Ron, E. Linder, L. N. Pfeiffer

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

Abstract

We report on the effect of photogenerated free carriers on the spectral diffusion and on the LO-phonon Raman scattering of resonantly excited excitons. This is observed by an exciton population redistribution between localized states and by a decrease in the Raman scattering intensity under an extremely weak, additional, above bandgap excitation. We interpret these effects by a new channel for exciton transfer induced by free carrier -exciton scattering that adds up to the phonon assisted exciton tunneling between the states that arise from interface roughness.

Original language	English (US)
Pages (from-to)	179
Number of pages	1
Journal	Superlattices and Microstructures
Volume	15
Issue number	2
DOIs	https://doi.org/10.1006/spmi.1994.1036
State	Published - Mar 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1006/spmi.1994.1036

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abstract = "We report on the effect of photogenerated free carriers on the spectral diffusion and on the LO-phonon Raman scattering of resonantly excited excitons. This is observed by an exciton population redistribution between localized states and by a decrease in the Raman scattering intensity under an extremely weak, additional, above bandgap excitation. We interpret these effects by a new channel for exciton transfer induced by free carrier -exciton scattering that adds up to the phonon assisted exciton tunneling between the states that arise from interface roughness.",

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year = "1994",

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AU - Ashkinadze, B. M.

AU - Cohen, E.

AU - Ron, Arza

AU - Linder, E.

AU - Pfeiffer, L. N.

PY - 1994/3

Y1 - 1994/3

N2 - We report on the effect of photogenerated free carriers on the spectral diffusion and on the LO-phonon Raman scattering of resonantly excited excitons. This is observed by an exciton population redistribution between localized states and by a decrease in the Raman scattering intensity under an extremely weak, additional, above bandgap excitation. We interpret these effects by a new channel for exciton transfer induced by free carrier -exciton scattering that adds up to the phonon assisted exciton tunneling between the states that arise from interface roughness.

AB - We report on the effect of photogenerated free carriers on the spectral diffusion and on the LO-phonon Raman scattering of resonantly excited excitons. This is observed by an exciton population redistribution between localized states and by a decrease in the Raman scattering intensity under an extremely weak, additional, above bandgap excitation. We interpret these effects by a new channel for exciton transfer induced by free carrier -exciton scattering that adds up to the phonon assisted exciton tunneling between the states that arise from interface roughness.

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IS - 2

ER -

The effects of photoexcited free carriers on exciton dynamics in GaAs/AlGaAs quantum wells

Abstract

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