Measurement of the ambipolar carrier capture time in a gallium arsenide/aluminum gallium arsenide separate confinement heterostructure quantum well

P.W.M. Blom, R.F.X.A.M. Mols, J.E.M. Haverkort, M.R. Leijs, J.H. Wolter

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Abstract

The carrier capture in a separate confinement heterostructure quantum well has been studied both experimentally and theoretically. Our calculations show that the electron and hole capture time vary strongly as a function of the excess energy. At an excess energy of 40 meV, both capture times are equal resulting in an ambipolar capture process which allows a direct comparison between theory and experiment. We carried out subpicosecond luminescence spectroscopy experiments and deduce an ambipolar overall capture time of 20 ps, a number which for the first time is in agreement with theoretical predictions. The quantum mechanical overall capture time of 20 ps gives rise to a classical local capture time of 3 ps which is determined from a diffusion model.
Original languageEnglish
Pages (from-to)319-321
JournalSuperlattices and Microstructures
Volume7
Issue number4
DOIs
Publication statusPublished - 1990

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Aluminum gallium arsenide
Gallium arsenide
Semiconductor quantum wells
gallium
Heterojunctions
quantum wells
aluminum
Luminescence
Experiments
Spectroscopy
Electrons
electron capture
luminescence
energy
predictions
spectroscopy

Cite this

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title = "Measurement of the ambipolar carrier capture time in a gallium arsenide/aluminum gallium arsenide separate confinement heterostructure quantum well",
abstract = "The carrier capture in a separate confinement heterostructure quantum well has been studied both experimentally and theoretically. Our calculations show that the electron and hole capture time vary strongly as a function of the excess energy. At an excess energy of 40 meV, both capture times are equal resulting in an ambipolar capture process which allows a direct comparison between theory and experiment. We carried out subpicosecond luminescence spectroscopy experiments and deduce an ambipolar overall capture time of 20 ps, a number which for the first time is in agreement with theoretical predictions. The quantum mechanical overall capture time of 20 ps gives rise to a classical local capture time of 3 ps which is determined from a diffusion model.",
author = "P.W.M. Blom and R.F.X.A.M. Mols and J.E.M. Haverkort and M.R. Leijs and J.H. Wolter",
year = "1990",
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Measurement of the ambipolar carrier capture time in a gallium arsenide/aluminum gallium arsenide separate confinement heterostructure quantum well. / Blom, P.W.M.; Mols, R.F.X.A.M.; Haverkort, J.E.M.; Leijs, M.R.; Wolter, J.H.

In: Superlattices and Microstructures, Vol. 7, No. 4, 1990, p. 319-321.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Measurement of the ambipolar carrier capture time in a gallium arsenide/aluminum gallium arsenide separate confinement heterostructure quantum well

AU - Blom, P.W.M.

AU - Mols, R.F.X.A.M.

AU - Haverkort, J.E.M.

AU - Leijs, M.R.

AU - Wolter, J.H.

PY - 1990

Y1 - 1990

N2 - The carrier capture in a separate confinement heterostructure quantum well has been studied both experimentally and theoretically. Our calculations show that the electron and hole capture time vary strongly as a function of the excess energy. At an excess energy of 40 meV, both capture times are equal resulting in an ambipolar capture process which allows a direct comparison between theory and experiment. We carried out subpicosecond luminescence spectroscopy experiments and deduce an ambipolar overall capture time of 20 ps, a number which for the first time is in agreement with theoretical predictions. The quantum mechanical overall capture time of 20 ps gives rise to a classical local capture time of 3 ps which is determined from a diffusion model.

AB - The carrier capture in a separate confinement heterostructure quantum well has been studied both experimentally and theoretically. Our calculations show that the electron and hole capture time vary strongly as a function of the excess energy. At an excess energy of 40 meV, both capture times are equal resulting in an ambipolar capture process which allows a direct comparison between theory and experiment. We carried out subpicosecond luminescence spectroscopy experiments and deduce an ambipolar overall capture time of 20 ps, a number which for the first time is in agreement with theoretical predictions. The quantum mechanical overall capture time of 20 ps gives rise to a classical local capture time of 3 ps which is determined from a diffusion model.

U2 - 10.1016/0749-6036(90)90217-U

DO - 10.1016/0749-6036(90)90217-U

M3 - Article

VL - 7

SP - 319

EP - 321

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

SN - 0749-6036

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ER -