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SM ISO690:2012 KLYUKANOV, Alexandr, SUSHKEVICH, Konstantin, CHYUKICHEV, M., AWAWDEH, Adnan, GURĂU, Virginia, CATANOI, A.. Multiplasmon radiation line replicas of bound excitons in single ZnSe crystals. In: Journal of Optoelectronics and Advanced Materials, 2006, vol. 8, pp. 123-127. ISSN 1454-4164. |
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Journal of Optoelectronics and Advanced Materials | ||||||
Volumul 8 / 2006 / ISSN 1454-4164 | ||||||
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Pag. 123-127 | ||||||
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The cathode-luminescence of ZnSe single crystals, grown from vapour phase and heat treated in Bi melts [ZnSe(Bi)] at 1200 K for 120h, and also in Bi melts doped by Al [ZnSe(Bi, Al)] were investigated at 4.2 K. The LO-phonon replicas of free excitons emission line dominate in cathode-luminescence spectra of the samples heat treated in Bi followed by water quenching. The lines of bound excitons series, I1s,d - nLO , were observed in the emission of all samples, including the original ones. It was found that plasmon replicas are not proper only for I1s - nLO lines, but, also, for I1d - nLO lines. The weak exciton-plasmon coupling is manifested in one plasmon Stokes side band shoulders of I1d - nLO lines. It is developed the theory of bound excitons multi-quantum optical transitions with participation of mixed plasmon-phonon oscillation modes. This theory allows for the calculation of the emission spectra form-function, without using any model. The theoretical spectra are in agreement with the experimental data. |
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Cuvinte-cheie Bound exciton lines, Cathodo-luminescence, Multi-quantum optical transition, ZnSe single crystal |
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