Electron and Hole Trions in Wide GaAs Quantum Wells

Esser, A.; Runge, Erich; Zimmermann, R.; Langbein, Wolfgang Werner

doi:10.1002/1521-3951(200009)221:1<281::aid-pssb281>3.0.co;2-u

Cited by 17 publications

(18 citation statements)

References 17 publications

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“…In contrast to the exciton transition, where only the k ¼ 0 component of the exciton states contributes to the oscillator strength, optical transitions are possible for all trion momenta k. Indeed, it has been shown in wide GaAs QWs that trions transfer their momentum to the remaining electron in the optical transition. This recoiling energy is subtracted from the photon energy, giving rise to an asymmetric trion lineshape [16,17].…”

Section: Experimental Set-up and Resultsmentioning

confidence: 99%

Localization Properties of Trions

Esser

Yayon

Bar‐Joseph

2002

phys. stat. sol. (b)

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78.55.Cr Dedicated to Professor Dr. Roland Zimmermann on the occasion of his 60th birthdayWe present an experimental and theoretical microscopic view on the optical trion spectrum in the presence of disorder. Although strong spatial fluctuations in near-field spectra point to strongly localized trion states, the far-field spectrum reveals the contribution of weakly localized trion states in addition. It is shown, that the underlying physics involves the optical transition between two disorder eigenstates of different localization length.

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Section: Experimental Set-up and Resultsmentioning

confidence: 99%

Localization Properties of Trions

Esser

Yayon

Bar‐Joseph

2002

phys. stat. sol. (b)

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“…They do not contribute to the absorption changes due to incoherent single-particle occupations f that are linear with respect to the test field. We thus obtain [3,4,18] @ @t…”

Section: Theoretical Approach Our Analysis Starts From the General Hamentioning

confidence: 56%

“…Their dynamics can be determined using the total Hamiltonian H and the Heisenberg equation. The resulting equation of motion can be split into a homogeneous and an inhomogeneous part [1][2][3][4][17][18][19]. The equations for p vc 12 read @ @t…”

Section: Theoretical Approach Our Analysis Starts From the General Hamentioning

confidence: 99%

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Signatures of Trions in the Optical Spectra of Doped Semiconductor Nanorings in a Magnetic Field

Meier

Thomas

Koch

et al. 2002

phys. stat. sol. (b)

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PACS: 71.35.Cc; 71.45.Gm; Dedicated to Professor Dr. Roland Zimmermann on the occasion of his 60th birthday A density-matrix theory for absorption changes in semiconductors induced by electron or hole occupations is outlined. Bound and unbound trions are included via four-point correlation functions representing electron-hole pair transitions in the presence of carrier populations. The spectra calculated for semiconductor nanorings show bleaching of the exciton resonance and induced absorption at energies corresponding to transitions to bound and unbound trion states. Without a magnetic field, induced absorption below the exciton line due to bound negatively (positively) charged trions appears when the two electrons (holes) of the trion are in different bands. A magnetic field introduces characteristic modifications of the spectra that can be attributed to the Aharonov-Bohm effect. It may lead to the formation of additional bound magneto-trion states.

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“…Two QW widths are considered: 100 A (solid line) and 300 A (dashed line). Our results are in good agreement with the theoretical values obtained by Esser et al [12]. The carrier confinement is stronger for the narrowest well.…”

Section: Resultsmentioning

confidence: 99%