Thermalization of hot electrons in quantum wells

C. H. Yang; S. A. Lyon

doi:10.1016/0378-4363(85)90360-2

Thermalization of hot electrons in quantum wells

C. H. Yang, S. A. Lyon

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

22 Scopus citations

Abstract

We present a new photoluminescence technique for studying hot electron relaxation in quantum wells. Two lasers are used to measure the density of photoexcited electrons at energies well above the thermalized distribution. The method has been used to determine the relaxation rate for hot electrons in a GaAs/Al_1-xGa_xAs multi-quantum well structure with an electron density of 2.5×10¹¹/cm². Electrons appear to "bottleneck" in a subband, thermalizing about 10 times more slowly (0.03 eV/ps) at the bottom of the subband than higher up.

Original language	English (US)
Pages (from-to)	305-308
Number of pages	4
Journal	Physica B+C
Volume	134
Issue number	1-3
DOIs	https://doi.org/10.1016/0378-4363(85)90360-2
State	Published - Nov 1985

All Science Journal Classification (ASJC) codes

General Engineering

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10.1016/0378-4363(85)90360-2

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title = "Thermalization of hot electrons in quantum wells",

abstract = "We present a new photoluminescence technique for studying hot electron relaxation in quantum wells. Two lasers are used to measure the density of photoexcited electrons at energies well above the thermalized distribution. The method has been used to determine the relaxation rate for hot electrons in a GaAs/Al1-xGaxAs multi-quantum well structure with an electron density of 2.5×1011/cm2. Electrons appear to {"}bottleneck{"} in a subband, thermalizing about 10 times more slowly (0.03 eV/ps) at the bottom of the subband than higher up.",

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year = "1985",

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T1 - Thermalization of hot electrons in quantum wells

AU - Yang, C. H.

AU - Lyon, S. A.

PY - 1985/11

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N2 - We present a new photoluminescence technique for studying hot electron relaxation in quantum wells. Two lasers are used to measure the density of photoexcited electrons at energies well above the thermalized distribution. The method has been used to determine the relaxation rate for hot electrons in a GaAs/Al1-xGaxAs multi-quantum well structure with an electron density of 2.5×1011/cm2. Electrons appear to "bottleneck" in a subband, thermalizing about 10 times more slowly (0.03 eV/ps) at the bottom of the subband than higher up.

AB - We present a new photoluminescence technique for studying hot electron relaxation in quantum wells. Two lasers are used to measure the density of photoexcited electrons at energies well above the thermalized distribution. The method has been used to determine the relaxation rate for hot electrons in a GaAs/Al1-xGaxAs multi-quantum well structure with an electron density of 2.5×1011/cm2. Electrons appear to "bottleneck" in a subband, thermalizing about 10 times more slowly (0.03 eV/ps) at the bottom of the subband than higher up.

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EP - 308

JO - Physica B+C

JF - Physica B+C

IS - 1-3

ER -

Thermalization of hot electrons in quantum wells

Abstract

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