Exchange splitting of light hole excitons in Al1−χGaχAs-GaAs quantum wells

Berz, M.; Andreani, Lucio Claudio; Steigmeier, E. F.; Reinhart, F. K.

doi:10.1016/0038-1098(91)90149-p

Cited by 22 publications

(2 citation statements)

References 8 publications

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“…The most noticeable feature in these curves is the Z splitting mode from the T and L modes which results from the exchange interaction. This splitting has been detected in square quantum wells in photoluminescence experiments [25].…”

Section: Resultsmentioning

confidence: 54%

Confined exciton-polaritons in parabolic and Gaussian quantum wells

Mandhour¹,

Jaziri²,

Bennaceur³

1997

Semicond. Sci. Technol.

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In order to study the confined polaritons in gradual quantum structures we have calculated the exciton binding energies of parabolic and Gaussian quantum wells using a variational perturbative approach. In the linear regime, we have established, by means of the semi-classical theory, the dispersion modes of a polariton confined in quantum wells, where the confining potentials are parabolic and Gaussian. In fact, we have evaluated the oscillator strength of each quantum well in order to get an idea about the confinement size and we have concluded that the polariton is more confined in a Gaussian quantum well than in a parabolic quantum well. To make a complete description of the confined polariton we have taken into account the electron-hole exchange energy. Numerical results show that the largest effect arising from the exciton-radiation interaction is the ZT and LT splittings, which strongly depend on the quantum confinement.

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Section: Resultsmentioning

confidence: 54%

Confined exciton-polaritons in parabolic and Gaussian quantum wells

Mandhour¹,

Jaziri²,

Bennaceur³

1997

Semicond. Sci. Technol.

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show abstract

“…The different effective masses of heavy holes (HH) and light holes (LH) lead in QDs to different confinement energies of the two upper hole states similar to the confinement of holes in semiconductor quantum wells [26]. This energetic separation makes it more likely for the HH states to be populated, so that one can treat the hole states in a good approximation as pure HH states [8].…”

Section: Excitonic Fssmentioning

confidence: 99%

Experimental methods of post-growth tuning of the excitonic fine structure splitting in semiconductor quantum dots

et al. 2012

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Deterministic sources of polarization entangled photon pairs on demand are considered as important building blocks for quantum communication technology. It has been demonstrated that semiconductor quantum dots (QDs), which exhibit a sufficiently small excitonic fine structure splitting (FSS) can be used as triggered, on-chip sources of polarization entangled photon pairs. As-grown QDs usually do not have the required values of the FSS, making the availability of post-growth tuning techniques highly desired. This article reviews the effect of different post-growth treatments and external fields on the FSS such as thermal annealing, magnetic fields, the optical Stark effect, electric fields, and anisotropic stress. As a consequence of the tuning of the FSS, for some tuning techniques a rotation of the polarization of the emitted light is observed. The joint modification of polarization orientation and FSS can be described by an anticrossing of the bright excitonic states.

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Some Selected Aspects of Light-Matter Interaction in Solids

Klingshim¹

NATO Science Series: B:

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Exchange splitting of light hole excitons in Al1−χGaχAs-GaAs quantum wells

Cited by 22 publications

References 8 publications

Confined exciton-polaritons in parabolic and Gaussian quantum wells

Confined exciton-polaritons in parabolic and Gaussian quantum wells

Experimental methods of post-growth tuning of the excitonic fine structure splitting in semiconductor quantum dots

Some Selected Aspects of Light-Matter Interaction in Solids

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