EXCITON-TWO-PHONON RABMAN SCATTERING OF LIGHT IN A QUANTUM WELL
Authors
Barat Eshpulatovich Eshpulatov, Dilafruz Shakarbekovna Xujanova, Uktam Ibodullayevich Azimov
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Annotation
The theory of exciton-two-phonon resonant Raman scattering of light in a quantum well has been developed. It is shown that in the case of exciton-two-phonon Raman scattering of light, in which two-dimensional excitons appear as intermediate states, it leads to a sharp increase in scattering (in(α0-3ln2α0
)times (where α0
- dimensionless Fröhlich constant of interaction of two-dimensional excitons with LO phonons,α0≪1
) ) compared to the mechanism of electron-hole pairs. The amplification is due to the fact that in a quantum well, in which the energies of the electron and hole are dimensionally quantized, the process of direct creation (or direct annihilation) of an exciton and the actual emission of a second phonon by the exciton are possible. The scattering tensor at the maximum of the second phonon repetition peak is α0-1
.
Keywords
Authors
Barat Eshpulatovich Eshpulatov, Dilafruz Shakarbekovna Xujanova, Uktam Ibodullayevich Azimov
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