Self-trapping phenomenon in exciton-polariton dynamicsOptics and Spectroscopy - Tập 115 - Trang 823-827 - 2013
O. F. Vasilieva, P. I. Khadzhi
The polariton dynamics in a microcavity in the parametric oscillator mode, when two pump polaritons are transformed into signal and idler polaritons and vice versa, has been studied. A nonlinear differential equation is obtained, which describes the temporal evolution of pump-polariton density, the solution of which is expressed in terms of the Jacobi elliptical functions. The amplitude and period...... hiện toàn bộ
Spectral, luminescent, and lasing characteristics of pyridyloxazole derivatives in inorganic and hybrid gel materialsOptics and Spectroscopy - Tập 104 - Trang 190-195 - 2011
R. T. Kuznetsova, G. V. Mayer, Yu. A. Manekina, E. N. Tel’minov, S. M. Arabei, T. A. Pavich, K. N. Solovyov
The spectral, luminescent, lasing, and photochemical characteristics of two pyridyloxazole derivatives incorporated during the sol-gel synthesis into inorganic silicate and hybrid organic-inorganic xerogels in the form of bulk matrices and thin films are studied. It is found that organic molecules are fixed in nanopores of solid matrices by specific interactions between proton-accepting centers of...... hiện toàn bộ
Palladium-like XeIX-CeXIII spectra: Effective interaction and radiative constantsOptics and Spectroscopy - Tập 95 - Trang 869-872 - 2003
A. V. Loginov
A semiempirical least squares method is used to determine the wave functions for the intermediate coupling between the 4d
95s, 4d
95p, and 4d
95d levels in the XeIX-CeXIII spectra and to calculate the radiative lifetimes of the 4d
95p and 4d
95d levels in these spectra.
Simulation of shadings in systems of opaque particlesOptics and Spectroscopy - Tập 88 - Trang 619-622 - 2000
D. G. Stankevich, Yu. G. Shkuratov, K. O. Muinonen, O. V. Miloslavskaya
Results of computer simulation of the shading effect in systems of opaque spherical particles scattering light in accordance with the Lambert law are presented. Two types of systems are studied: a semi-infinite medium and statistically uniform clusters of a finite number of particles. The simulation makes it possible to obtain photometric characteristics of systems with an accuracy better than 1%....... hiện toàn bộ
Separation of a weak fluorescence signal of 3-hydroxyflavone using dynamic quenchingOptics and Spectroscopy - Tập 106 - Trang 355-358 - 2009
V. I. Tomin
The spectral and time characteristics of the dual fluorescence of a 3-hydroxyflavone probe in a solution with a fluorescence quencher are studied in the temperature range of 20–80°C. At room temperature, the fluorescence consists of two bands that belong to the normal and tautomeric forms of the luminophore, while heating of the solution results in the appearance of an additional fluorescence band...... hiện toàn bộ
Optical, nanostructural, and biophysical properties of Zn-induced changes in human erythrocyte membranesOptics and Spectroscopy - Tập 110 - Trang 534-540 - 2011
A. Ya. Khairullina, T. V. Ol’shanskaya, D. S. Filimonenko, N. M. Kozlova, Yu. M. Garmaza, E. I. Slobozhanina
We studied changes in the surface of erythrocyte membranes exposed to the action of zinc sulfate in the concentration range of 0.1–2.0 mM/l using methods of light scattering, spectrofluorimetry, and atomic force microscopy. Using the spectrofluorimetry method, we revealed a dose-dependent increase in the fluorescence intensity of a fluorescamine probe incorporated into erythrocyte membranes modifi...... hiện toàn bộ
Narrowing of sub-Doppler saturated-absorption resonances in multilayer gas cellsOptics and Spectroscopy - Tập 117 - Trang 139-144 - 2014
A. Ch. Izmailov
We have studied theoretically nontrivial specific features of sub-Doppler resonances of saturated absorption in a multilayer gas cell with a rarefied gas medium, which is a compact analog of a large number of plane-parallel atomic beams. Spatially separated saturating and probing monochromatic laser beams that co- and counterpropagate (at the same frequency) in this cell have been considered. In t...... hiện toàn bộ