Zobrazeno 1 - 10
of 65
pro vyhledávání: '"M. Goulkov"'
Publikováno v:
Journal of Physics: Condensed Matter. 18:3037-3052
An experimental study of intensity dependent properties of photo-induced scattering (beam fanning) in Ce-doped Sr0.61Ba0.39Nb2O6, both field-free and under the action of external electric fields, is reported. A new effect, the spontaneous local reori
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ecd48203171efba926f6fbc2a320688
https://doi.org/10.1088/0953-8984/18/11/010
https://doi.org/10.1088/0953-8984/18/11/010
Publikováno v:
Europhysics Letters (EPL). 66:48-54
A new photorefractive approach using the temperature evolution of beam fanning to study the polar structure of the ferroelectric relaxor strontium-barium-niobate (SBN) undergoing the ferroelectric-paraelectric phase transition is proposed. A strong t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db54d1773860768ef2b56d3c9a56e9b7
https://doi.org/10.1209/epl/i2003-10185-0
https://doi.org/10.1209/epl/i2003-10185-0
Publikováno v:
Applied Physics B: Lasers and Optics. 76:407-416
We study light-induced scattering (beam-fanning) in the photorefractive crystal SBN:Ce as a function of the polar structure of the crystal. The spatial structure of the beam-fanning is measured at different externally applied electric fields, and an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2429c14866ee2d6ebefa54d09005cf4f
https://doi.org/10.1007/s00340-003-1116-8
https://doi.org/10.1007/s00340-003-1116-8
Publikováno v:
Optics Communications. 218:173-182
The temperature dependence of the light-induced polarization–isotropic scattering in strontium–barium–niobate (SBN) doped with 0.66 mol% cerium is studied in a temperature range covering the ferroelectric phase and the relaxor phase transition.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::acdb7f2f8240e804b6c52ad86d7fa08d
https://doi.org/10.1016/s0030-4018(03)01190-8
https://doi.org/10.1016/s0030-4018(03)01190-8
Autor:
V. Pruneri, S. G. Odoulov, G.F. Calvo, B. Sturman, M. Goulkov, Evgeniy V. Podivilov, Fernando Agulló-López, I. I. Naumova
Publikováno v:
Physical Review Letters. 86:4021-4024
The first observation of parametric light scattering patterns (rings, lines, and dots) in bulk periodically poled nonlinear media is reported. Development of the scattering patterns proves efficient photorefractive grating recording and considerable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee8fac1b6c2bb8725e88e01ed6f686b3
https://doi.org/10.1103/physrevlett.86.4021
https://doi.org/10.1103/physrevlett.86.4021
Publikováno v:
Applied Physics B. 72:187-190
The threshold behavior is studied for a ring-loop coherent oscillator with a photorefractive strontium barium niobate (SBN) sample. A soft onset of oscillation is revealed and critical slowing down is observed in the temporal development of light-ind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca3d1cdb88fb83c0bae6ec31e259d25b
https://doi.org/10.1007/s003400000434
https://doi.org/10.1007/s003400000434
Publikováno v:
Physical Review Letters. 83:3637-3640
Starting from publication of Haken [1] it has become clear that the onset of oscillation in lasers can be considered as a kind of nonequilibrium optical phase transition. Below the threshold an active medium emits spontaneous radiation with a rather
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f3d1f13e33756ad74adfbb6ad18847c
https://doi.org/10.1103/physrevlett.83.3637
https://doi.org/10.1103/physrevlett.83.3637
Publikováno v:
Optics Communications. 146:220-224
We demonstrate a new method of light amplification in photorefractive BaTiO 3 . An ordinary signal beam is amplified by an extraordinary and an ordinary pump beam. A forward phase-conjugate beam is simultaneously generated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e313f5978f0f53c1fdd91684096be06
https://doi.org/10.1016/s0030-4018(97)00540-3
https://doi.org/10.1016/s0030-4018(97)00540-3
Publikováno v:
Optical Materials. 4:314-317
Light-induced scattering is investigated in photorefractive LiNbO 3 :Fe and LiNbO 3 :Cu crystals with a photovoltaic charge transport. Differences in the energy transfer for orthogonally polarized waves are shown to be the reason for the appearance o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fdfcd537dd7da687376ed8e8cdc897b
https://doi.org/10.1016/0925-3467(94)00078-6
https://doi.org/10.1016/0925-3467(94)00078-6
Publikováno v:
Journal of Modern Optics. 40:2143-2149
We describe our study of the spatial resolution of a phase-conjugating ring-resonator (PCR) consisting of a Sagnac interferometer and a phase-conjugating mirror based on four-wave mixing in photorefractive BaTiO3. The use of optical image processing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aca77455f761deeeb63a2a6c82dc8ec7
https://doi.org/10.1080/09500349314552171
https://doi.org/10.1080/09500349314552171