Influence of exciton-exciton interactions on the coherent optical response in GaAs quantum wells

Bott, Kimberly; Heller, O.; Bennhardt, D.; Cundiff, Steven T.; Thomas, P.; Mayer, Ernest; Smith, G. O.; Eccleston, Richard; Kühl, J.; Ploog, K.

doi:10.1103/physrevb.48.17418

Cited by 174 publications

(79 citation statements)

References 24 publications

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“…Many works have been devoted to exciton-exciton (X-X) interactions [3][4][5][6][7][8][9][10][11][12][13][14]. They however [15] accept or end with an effective bosonic Hamiltonian, so that they do not tackle the consequences of transforming exact excitons into bosons.…”

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confidence: 99%

Scattering Rates and Lifetime of Exact and Boson Excitons

Combescot

Betbeder‐Matibet

2004

Phys. Rev. Lett.

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Although excitons are not exact bosons, they are commonly treated as such provided that their composite nature is included in effective scatterings dressed by exchange. We here prove that, whatever these scatterings are, they cannot give both the exciton scattering rates T −1 ij and lifetime τ 0 , correctly: A striking factor 1/2 exists between τ −1 0 and the sum of T −1 ij 's, which originates from the composite nature of excitons, irretrievably lost when they are bosonized. This result, which appears as very disturbing at first, casts major doubts on the overall validity of bosonization for problems dealing with interacting excitons.PACS.: 71.35.-y Excitons and related phenomena 1

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confidence: 99%

Scattering Rates and Lifetime of Exact and Boson Excitons

Combescot

Betbeder‐Matibet

2004

Phys. Rev. Lett.

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“…Their homogeneous linewidth decreases slowly with decreasing transition energy ranging from 0.22 to 0.13 meV and shows only a weak density dependence. The formation of biexcitons is identified by polarizationdependent FWM measurements, for which the selection rules can be derived from four-level 24 or five-level 25 Bloch equations. Figure 3 shows FWM spectra for ͑↑↑͒ and ͑↑→͒ polarization configurations.…”

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Exciton dephasing and biexciton binding in CdSe/ZnSe islands

et al. 1999

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“…Polarization-dependent four-wave mixing ͑FWM͒ quantum beats [1][2][3][4][5][6][7][8][9][10][11] have been observed after simultaneous excitations of two optical transitions, associated with heavy hole and light hole. The signal magnitude and its beat phase were found to depend on the relative linear polarization of the pump and test pulses.…”

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Polarization-dependent quantum beats of four-wave mixing in the Luttinger model for bulk semiconductors

2007

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We examine the description of quantum beats in four-wave mixing with bulk semiconductors within the framework of the Luttinger-Kohn model. An analytic expression for their dependence on the relative linear polarization of pump and probe is derived, taking only the band structure and coherent interaction of the light waves with the semiconductor medium into account. Herewith all features seen in experiments are very well reproduced, e.g., the vanishing of the beats for an angle 0 Ϸ 76°between the polarizations of pump and probe. Therefore, as opposed to general belief based on earlier theoretical work, no ad hoc exciton-exciton Coulomb interaction has to be invoked to describe the observed phase and magnitude of the quantum beats for copolarized or for cross-polarized test and pump pulses.

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Influence of exciton-exciton interactions on the coherent optical response in GaAs quantum wells

Cited by 174 publications

References 24 publications

Scattering Rates and Lifetime of Exact and Boson Excitons

Scattering Rates and Lifetime of Exact and Boson Excitons

Exciton dephasing and biexciton binding in CdSe/ZnSe islands

Polarization-dependent quantum beats of four-wave mixing in the Luttinger model for bulk semiconductors

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