“Thermal barrier” effect in energy relaxation of polaritons in HgI2 |
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| Authors: | M.S. Brodin I.V. Blonskii A.O. Gushcha V.M. Nitsovich V.V. Tishchenko V.S. Blashkiv V.N. Nimetskii |
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| Affiliation: | Institute of Physics, Academy of Sciences of the Ukrainian SSR, Kiev, USSR;Ped. Institute, Drogobich, USSR |
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| Abstract: | The paper presents the results of measurements of polariton radiation spectra, polariton band excitation spectra and spectra of resonance Raman scattering HgI2. These are registered at different temperatures and units of energetic derangement between the exciting radiation quantum energy and that of transverse exciton. The threshold value of the temperature (T=12 K) starting from which there is attained the equilibrium between the polariton and phonon subsystems is found. The scattering mechanism that guides the formation of “thermal barrier” favouring the polaritons thermalization, is revealed. |
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