Thermalization of hot electrons in quantum wells

C. H. Yang; Stephen Aplin Lyon

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

Thermalization of hot electrons in quantum wells

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

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 - Jan 1 1985

All Science Journal Classification (ASJC) codes

Engineering(all)

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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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AU - Yang, C. H.

AU - Lyon, Stephen Aplin

PY - 1985/1/1

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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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JF - Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics

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Thermalization of hot electrons in quantum wells

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