Recharging of local centers and diagnostics of laser and nonlinear crystals

Ivan S. Gorban; A. F. Gumenjuk; S. Yu Kutovoy

doi:10.1117/12.191986

31 October 1994 Recharging of local centers and diagnostics of laser and nonlinear crystals

Ivan S. Gorban, A. F. Gumenjuk, S. Yu Kutovoy

Proceedings Volume 2113, Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics; (1994) https://doi.org/10.1117/12.191986
Event: Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics: International Workshop, 1993, Kiev, Ukraine

Abstract

The oscillator regularity E equals h(omega) _i (n + 1/2) at the traps energy spectra was observed in a number of complex crystals: in Ba₂NaNb₅O₁₅ and YAlO₃ one series was observed; in CsCdCl₃ -- two; in ZnWO₄, ZnWO₄:Ni -- three; in Y₃Al₅O₁₅ -- five series. Most of the h(omega) _i are coincident with the high- frequency lines of the first-order Raman spectra, others -- with the second order Raman lines or the Raman lines caused by impurities. Accuracy of coincidence is 0.1 - 3.3%. The explanation of the oscillator regularity was done within the framework of the polaron trap model. Two variations of the model are offered: the trap is either an autolocalized polaron or a polaron stabilized by the field of intrinsic or impurity defects. In both cases the polaron energy states are described by the parabolic potential curves with equidistant vibration levels. The thermal activation energy is then determined by the number of a level from which the tunneling either in the polaron band or in the excited exciton state adjacent to the luminescence center is possible.

Citation Download Citation

Ivan S. Gorban, A. F. Gumenjuk, and S. Yu Kutovoy "Recharging of local centers and diagnostics of laser and nonlinear crystals", Proc. SPIE 2113, Optical Diagnostics of Materials and Devices for Opto-, Micro-, and Quantum Electronics, (31 October 1994); https://doi.org/10.1117/12.191986

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