Zobrazeno 1 - 10
of 38
pro vyhledávání: '"A.G. Avanesov"'
Publikováno v:
Solid State Communications. 146:298-303
A new model which describes the peculiarities of the phonon spectra of homo- and heterodesmic crystals is developed in the present paper. A salient feature of the model is that the specific properties of the heterodesmic compounds (existence of large
Autor:
A.G. Avanesov, V.A. Lebedev, Mikhail G. Brik, A.L. Mihaylenko, V.V. Galutskiy, B.V. Ignatyev, E.V. Stroganova, V.A. Isaev
Publikováno v:
Journal of Non-Crystalline Solids. 352:2395-2398
Cr3+-doped stoichiometric LiNbO3 crystals were grown and detailed spectroscopic investigations were performed. The samples are characterized by extremely low frequency factor of the luminescence thermal quenching. Its numerical value 1.7 × 108 s−1
Autor:
A P Vink, Piotr A. Rodnyi, A.G. Avanesov, C.W.E. van Eijk, J.T.M. de Haas, H Donker, Pieter Dorenbos
Publikováno v:
Journal of Physics: Condensed Matter. 14:8889-8899
The optical properties of SrAlF5:Pr3 + are studied. Emission measurements up to 1200 nm under blue-light excitation in the3P2 level reveal a large number of emissions all originating from the3P0 level and the1D2 level. Under vacuum ultraviolet excita
Autor:
E. van der Kolk, C.W.E. van Eijk, Pieter Dorenbos, A.G. Avanesov, Piotr A. Rodnyi, A.P. Vink, S. B. Mikhrin
Publikováno v:
Optics Communications. 204:237-245
The problem of obtaining two visible photons from a single incident vacuum ultraviolet photon is considered and conditions of cascade emission observation in various Pr 3+ -activated compounds are reviewed. Hosts with weak crystal field, low phonon e
Publikováno v:
Journal of Luminescence. 92:133-137
The model of energy levels crossing in the theory of non-radiative transitions (NRT) has been developed. In the framework of this model NRT are due to the crossing of purely electron energy states of the impurity ion caused by ligands thermal vibrati
Autor:
A.A. Perfilin, V. V. Zhorin, V.A. Lebedev, Andrey Okhrimchuk, A. V. Shestakov, Yu. M. Chuev, V. F. Pisarenko, A.G. Avanesov
Publikováno v:
Journal of Luminescence. :942-944
On the basis of luminescence lifetime studies we have determined the energy transfer parameters and population evolution for the 2 F 5 2 ( Yb 3+ ) , 4 I 11 2 and 4 I 3 2 (Er3+) energy levels in single crystals of ScBO3 (SBO), LaSc3(BO3)4 (LSB), LiY(B
Autor:
V. F. Pisarenko, A.G. Avanesov, T. G. Kuznetsova, Yu. A. Kuznetsov, V. V. Zhorin, V. G. Dvornikova
Publikováno v:
Journal of Applied Spectroscopy. 59:582-584
Autor:
Vladimir V. Fedorov, Valery V. Badikov, Sergey B. Mirov, V. Panutin, Galina S. Shevyrdayeva, A.G. Avanesov, K. Graham, Boris Ignat'ev, Mary Ellen Zvanut
Publikováno v:
SPIE Proceedings.
Laser properties and spectroscopic characterization of diffusion doped Cr 2+ : ZnS crystals synthesized by chemical transport reaction from gas phase are reported. Lasing was realized with a threshold of 170 J and slope efficiency of 9.5 % with respe
Autor:
Vladimir V. Fedorov, Sergey B. Mirov, Valery V. Badikov, G.S Shevirdyaeva, Mary Ellen Zvanut, K. Graham, A.G. Avanesov, Boris Ignat'ev, V. Panutin
Publikováno v:
Advanced Solid-State Lasers.
Spectroscopic, saturation, and laser properties of diffusion doped Cr2+:ZnS crystals synthesized by chemical reaction from gas phase are reported. Lasing was realized with a threshold of 170 µJ and slope efficiency of 9.5% with respect to the 1.5607
Publikováno v:
SPIE Proceedings.
Usually, broad-band spectra of transition-metal ions are explained as a result of vibrational quanta's emission or absorption. In this paper optical spectra are interpreted as a result of oscillator position detecting by absorption or emission of lig