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Photorefractive properties of a SBN crystal
Photorefractive Effects, Materials, and Devices, 2005We investigate the energy transformation in two-wave-mixing in dependence on the applied electric field and derive experimental relationships between electro-optical coefficients and electro-optical coupling gains responsible for the energy ...
A. Matusevich +4 more
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Ferroelectrics, 2004
The investigation of both Sr0.61Ba0.39Nb2O6 and Sr0.61Ba0.39Nb2O6 doped with La = 1 at% single crystals has shown the existing of two anomalies in temperature dependencies of logarithmic effective dispersion depth of low and infralow frequency dielectric permittivity lgΔϵ(T).
A. I. Burkhanov +5 more
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The investigation of both Sr0.61Ba0.39Nb2O6 and Sr0.61Ba0.39Nb2O6 doped with La = 1 at% single crystals has shown the existing of two anomalies in temperature dependencies of logarithmic effective dispersion depth of low and infralow frequency dielectric permittivity lgΔϵ(T).
A. I. Burkhanov +5 more
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Enhanced photorefractive effect in SBN:60:Cr and SBN.60:Rh with external dc fields
Annual Meeting Optical Society of America, 1989A major thrust of photorefractive materials research has been to increase the coupling constant Γ and speed up response time. Previous two-beam coupling experiments using SBN:60 have shown that the space charge field Esc, and therefore the coupling constant, can be increased to some degree by optimizing the characteristic fields En and Ed.1,2 However ...
Koichi Sayano +2 more
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Robust ferroelectricity in two-dimensional SbN and BiP
Nanoscale, 2018We discovered two types of monolayer ferroelectric materials, one of them has the highest spontaneous polarization among 2D ferroelectric materials.
Chang Liu +4 more
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Growth and investigation on photorefractive properties of SBN crystals
SPIE Proceedings, 1990It is established that one of the most sensitive material among ferroelectrics is strontium barium niobate crystals /SBN/ /1/. Holographic information recording makes great demands of optical quality and size of the crystals. The problem of producing optically homogeneous crystals is greatly complicated due to their doping and polarization processes ...
N.V. Bogodaev, L.I. Ivleva
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Rogue Waves in Photorefractive SBN Crystals
Latin America Optics and Photonics Conference, 2018We report on the excitation of large-amplitude waves, with very low probability, in photorefractive SBN crystals. We excite the system with a narrow gaussian beam and observe different dynamical regimes tailored by the crystal nonlinearity.
Poblete, Rodrigo Andres Vicencio +7 more
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Enhanced nondestructive holographic readout in SBN
Annual Meeting Optical Society of America, 1988We describe a novel arrangement for obtaining enhanced nondestructive holographic readout in SBN using polarization effects and modification of the applied field between recording and readout. The enhancement is most pronounced for a certain range of spatial frequencies.
Steve Redfield, Lambertus Hesselink
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Shallow traps in doped SBN crystals
Optical Materials, 1995Abstract Three different physical effects resulting from shallow traps in SBN crystals are demonstrated experimentally. They are: (i) intensity induced deformation of the dependence of the two-wave gain on the angle between the waves, (ii) two temporal scales of grating dynamics at CW illumination and (iii) a dark grating decay which depends on the ...
A.V. Mamaev +3 more
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Nursery World
As phase two of the school-based nursery expansion gets under way, suppliers supporting schools through the process reflect on key lessons from phase one. By Nicole Weinstein
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As phase two of the school-based nursery expansion gets under way, suppliers supporting schools through the process reflect on key lessons from phase one. By Nicole Weinstein
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Multiple image storage in SBN fibers
Annual Meeting Optical Society of America, 1989Photorefractive fibers of SBN provide an attractive medium for storing information. The information can be in the form of a 2-D image, called a page, and multiple pages may be stored in a single fiber by holographic recording. The multiple pages are distinguished by angular multiplexing of the reference wave.
Lambertus Hesselink, Steve Redfield
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