Propagation of exciton polaritons in

Wundke, K.; Neukirch, U.; Kubacki, F.; Gutowski, J.; Hommel, D.

doi:10.1016/0022-0248(95)00806-3

Cited by 5 publications

(2 citation statements)

References 9 publications

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“…For the 23 nm layer three prominent lines are seen exhibiting energy spacings none of them matching the expected strain-induced energy difference between 1s-hh and l s l h excitons of 10 to 11 meV. As was shown in an earlier paper [13] On the basis of k quantization the different resonances are identified as given in Fig. 4a and b.…”

Section: Transmission Spectramentioning

confidence: 76%

Propagation of femtosecond pulses in thin ZnSe layers

Neukirch

Wundke

Gutowski

et al. 1996

Physica Status Solidi (b)

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The transmission of optical femtosecond pulses through ZnSe/ZnS,Sel-, heterostructures is investigated in both the spectral and the temporal domain. Quantization of the polariton wave vector within the thin ZnSe layers (23 to 100 nm) leads to a variety of allowed propagating modes which are clearly resolved in transmission spectra. Interference of all contributing modes gives rise to a very pronounced and complex temporal beating behavior of the transmitted pulses measured with femtosecond resolution. The transmission spectra as well as the transients taken from different samples are consistently described by a model based on three-oscillator polariton theory using Pekar's additional boundary conditions.

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Section: Transmission Spectramentioning

confidence: 76%

Propagation of femtosecond pulses in thin ZnSe layers

Neukirch

Wundke

Gutowski

et al. 1996

Physica Status Solidi (b)

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“…For free dipole-active excitons in bulk material, where polariton effects become important, the situation is quite different and the energy dependencies of scattering processes, which limit the coherence times, have been studied [16][17][18][19][20] less extensively. This is partly due to the fact that the absorption of samples close or within their excitonic resonances is very strong.…”

Section: Introductionmentioning

confidence: 99%

Scattering and dephasing of excitonic polaritons in CuCl

Vanagas

Brinkmann

Kudrna

et al. 2002

J. Phys.: Condens. Matter

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We study the energy and intensity dependence of the dephasing time T2 of the polarization in CuCl inside an excitonic resonance by a femtosecond four-wave mixing technique at 5 K. We first compare results obtained on bulk material and on epitaxial films of different thicknesses for a backward-scattering configuration. This configuration is most sensitive to the region close to the surface of the samples. In bulk material, the coherence properties of the polarization are mainly limited by recombination processes and scattering with acoustic phonons while they are in addition influenced by scattering with impurities and/or imperfections in the epitaxial films. In these films, in a transmission configuration, the polarization dephases less rapidly than it appears in retrodiffusion, indicating the importance of surface recombination processes and of the polariton propagation.

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ZnSe quantum wells

Kalt

Landolt-Börnstein - Group III Condensed Matter

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Propagation of exciton polaritons in

Cited by 5 publications

References 9 publications

Propagation of femtosecond pulses in thin ZnSe layers

Propagation of femtosecond pulses in thin ZnSe layers

Scattering and dephasing of excitonic polaritons in CuCl

ZnSe quantum wells

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