Excitonic transitions in highly efficient (GaIn)As/Ga(AsSb) type-II quantum-well structures

S. Gies; C. Kruska; C. Berger; P. Hens; C. Fuchs; A. Ruiz Perez; N. W. Rosemann; J. Veletas; S. Chatterjee; W. Stolz; S. W. Koch; J. Hader; J. V. Moloney; W. Heimbrodt

doi:10.1063/1.4935212

Excitonic transitions in highly efficient (GaIn)As/Ga(AsSb) type-II quantum-well structures

S. Gies, C. Kruska, C. Berger, P. Hens, C. Fuchs, A. Ruiz Perez, N. W. Rosemann, J. Veletas, S. Chatterjee, W. Stolz, S. W. Koch, J. Hader, J. V. Moloney, W. Heimbrodt

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16 Scopus citations

Abstract

The excitonic transitions of the type-II (GaIn)As/Ga(AsSb) gain medium of a "W"-laser structure are characterized experimentally by modulation spectroscopy and analyzed using microscopic quantum theory. On the basis of the very good agreement between the measured and calculated photoreflectivity, the type-I or type-II character of the observable excitonic transitions is identified. Whereas the energetically lowest three transitions exhibit type-II character, the subsequent energetically higher transitions possess type-I character with much stronger dipole moments. Despite the type-II character, the quantum-well structure exhibits a bright luminescence.

Original language	English (US)
Article number	182104
Journal	Applied Physics Letters
Volume	107
Issue number	18
DOIs	https://doi.org/10.1063/1.4935212
State	Published - Nov 2 2015

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4935212

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title = "Excitonic transitions in highly efficient (GaIn)As/Ga(AsSb) type-II quantum-well structures",

abstract = "The excitonic transitions of the type-II (GaIn)As/Ga(AsSb) gain medium of a {"}W{"}-laser structure are characterized experimentally by modulation spectroscopy and analyzed using microscopic quantum theory. On the basis of the very good agreement between the measured and calculated photoreflectivity, the type-I or type-II character of the observable excitonic transitions is identified. Whereas the energetically lowest three transitions exhibit type-II character, the subsequent energetically higher transitions possess type-I character with much stronger dipole moments. Despite the type-II character, the quantum-well structure exhibits a bright luminescence.",

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T1 - Excitonic transitions in highly efficient (GaIn)As/Ga(AsSb) type-II quantum-well structures

AU - Gies, S.

AU - Kruska, C.

AU - Berger, C.

AU - Hens, P.

AU - Fuchs, C.

AU - Ruiz Perez, A.

AU - Rosemann, N. W.

AU - Veletas, J.

AU - Chatterjee, S.

AU - Stolz, W.

AU - Koch, S. W.

AU - Hader, J.

AU - Moloney, J. V.

AU - Heimbrodt, W.

PY - 2015/11/2

Y1 - 2015/11/2

N2 - The excitonic transitions of the type-II (GaIn)As/Ga(AsSb) gain medium of a "W"-laser structure are characterized experimentally by modulation spectroscopy and analyzed using microscopic quantum theory. On the basis of the very good agreement between the measured and calculated photoreflectivity, the type-I or type-II character of the observable excitonic transitions is identified. Whereas the energetically lowest three transitions exhibit type-II character, the subsequent energetically higher transitions possess type-I character with much stronger dipole moments. Despite the type-II character, the quantum-well structure exhibits a bright luminescence.

AB - The excitonic transitions of the type-II (GaIn)As/Ga(AsSb) gain medium of a "W"-laser structure are characterized experimentally by modulation spectroscopy and analyzed using microscopic quantum theory. On the basis of the very good agreement between the measured and calculated photoreflectivity, the type-I or type-II character of the observable excitonic transitions is identified. Whereas the energetically lowest three transitions exhibit type-II character, the subsequent energetically higher transitions possess type-I character with much stronger dipole moments. Despite the type-II character, the quantum-well structure exhibits a bright luminescence.

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Excitonic transitions in highly efficient (GaIn)As/Ga(AsSb) type-II quantum-well structures

Abstract

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