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Feuerbacher, B. F.; Kühl, J.; Ploog, K.

doi:10.1103/physrevb.43.2439

Cited by 115 publications

(31 citation statements)

References 14 publications

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“…9 For negative delay, the FWM signal decays very fast due to the dominating inhomogeneous broadening, in contrast to the biexcitonic quantum beats at negative delay times in homogeneously broadened systems. 20,21 To separate the exciton and biexciton contributions, we use a spectrally narrow ͑1.7 meV͒ pump pulse k ជ 1 . The resulting FWM signal for copolarized pump and probe ͓Fig.…”

mentioning

confidence: 99%

Binding-energy distribution and dephasing of localized biexcitons

1997

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confidence: 99%

Binding-energy distribution and dephasing of localized biexcitons

1997

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“…In the case of biexcitons, the signal at negative delays arises when two photons establish a two-photon coherence (e.g. a biexciton), from which a photon of another pulse can diffract, giving a signal that decays at a rate determined by the dephasing time of the two-photon coherence [67].…”

Section: Biexciton Dynamicsmentioning

confidence: 99%

Ultrafast spectroscopy of ZnO/ZnMgO quantum wells

Davis

Jagadish²

2009

Laser & Photonics Reviews

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We review recent work studying the dynamics in zinc oxide quantum wells (QWs) using ultrafast optical spectroscopy. These materials present exciting possibilities for optoelectronic device applications. In order to develop these applications, it is important to understand the mechanisms of the electronic processes occurring in ZnO/ZnMgO QWs. In this review, we discuss the excitonic lifetime and the impact of the internal electric field, the potential profile, phonons, and defects. We also discuss coherence dynamics and the observation of biexcitons at room temperature.The ZnO QW sample appears clear to visible light, but absorbs and radiates in the near UV on laser excitation.

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“…A strong biexcitonic contribution to the TR FWM signal from GaAs quantum wells was observed [47]. Biexciton effects are closely related to problems such as polarization-dependent properties of FWM [4], quantum beat behaviors, and TI FWM signal at negative delay, in experiments including grating-induced biexcitonic FWM signals, biexcitonic quantum beats, and two-photon coherence.…”

Section: Many-body Interactions In Semiconductorsmentioning

confidence: 99%