Electrical fixing of waveguide channels using dynamic self-focusing in strontium-barium niobate crystals

2002 ◽  
Author(s):  
D. Kip ◽  
C. Herden ◽  
M. Wesner
Keyword(s):  
Strontium Barium Niobate ◽  
Strontium Barium ◽  
Self Focusing

Birth, Evolution and Annihilation of Phase Singularities in the Propagation of a Laser Beam Passed Through a Self-Focusing Strontium Barium Niobate Crystal

1997 ◽  
Vol 06 (02) ◽  
pp. 169-180 ◽  
Author(s):  
A. V. Ilyenkov ◽  
L. V. Kreminskaya ◽  
M. S. Soskin ◽  
M. V. Vasnetsov
Keyword(s):  
Laser Beam ◽  
Wave Front ◽  
Free Space ◽  
Topological Charge ◽  
Optical Vortices ◽  
Strontium Barium Niobate ◽  
Strontium Barium ◽  
Self Focusing ◽  
Phase Singularities ◽  
Edge Dislocations

We report the first observations and the mechanism of natural nucleation, propagation and annihilation of optical vortices in a laser beam with initially smooth Gaussian wave front passed through self-focusing photorefractive strontium barium niobate crystal. Wave-front distortions due to the formation of thermal-induced nonlinear lens lead to the origin of phase singularities. Pairs of opposite topological charge screw wave-front dislocations nucleate and annihilate through a formation of limited edge dislocations. In a free-space propagation the alternating sign vortices array nested in the beam has the form of quadruple.

3-D Holographic Display Using Strontium Barium Niobate

1998 ◽  
Author(s):  
Christy A. Heid ◽  
Brian P. Ketchel ◽  
Gary L. Wood ◽  
Richard J. Anderson ◽  
Gregory J. Salamo
Keyword(s):  
Strontium Barium Niobate ◽  
Strontium Barium ◽  
Holographic Display

Domain dynamics of strontium-barium niobate crystals in low-frequency electric fields

1990 ◽  
Vol 111 (1) ◽  
pp. 299-305 ◽  
Author(s):  
A. I. Bezhanova ◽  
V. I. Silvestrov ◽  
T. A. Zeinalova ◽  
T. R. Volk
Keyword(s):  
Electric Fields ◽  
Low Frequency ◽  
Strontium Barium Niobate ◽  
Strontium Barium ◽  
Domain Dynamics

scholarly journals Polaronic conduction and Anderson localization in reduced strontium barium niobate

2015 ◽  
Vol 107 (23) ◽  
pp. 232901 ◽  
Author(s):  
Christopher S. Dandeneau ◽  
YiHsun Yang ◽  
Marjorie A. Olmstead ◽  
Rajendra K. Bordia ◽  
Fumio S. Ohuchi
Keyword(s):  
Anderson Localization ◽  
Strontium Barium Niobate ◽  
Strontium Barium

scholarly journals Photoconduction of Polar and Nonpolar Cuts of Undoped Sr0.61Ba0.39Nb2O6 Single Crystals

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 780
Author(s):  
Elke Beyreuther ◽  
Julius Ratzenberger ◽  
Matthias Roeper ◽  
Benjamin Kirbus ◽  
Michael Rüsing ◽  
...  
Keyword(s):  
Electrical Measurement ◽  
Excitation Wavelength ◽  
Trap States ◽  
Strontium Barium Niobate ◽  
Strontium Barium ◽  
Current Voltage ◽  
History Of ◽  
A Current ◽  
Complex Manner

In the last two decades, variably doped strontium barium niobate (SBN) has attracted a lot of scientific interest mainly due to its specific non-linear optical response. Comparably, the parental compound, i.e., undoped SBN, appears to be less studied so far. Here, two different cuts of single-crystalline nominally pure strontium barium niobate in the composition Sr0.61Ba0.39Nb2O6 (SBN61) are comprehensively studied and analyzed with regard to their photoconductive responses. We present conductance measurements under systematically varied illumination conditions along either the polar z-axis or perpendicular to it (x-cut). Apart from a pronounced photoconductance (PC) already under daylight and a large effect upon super-bandgap illumination in general, we observe (i) distinct spectral features when sweeping the excitation wavelength over the sub-bandgap region as then discussed in the context of deep and shallow trap states, (ii) extremely slow long-term relaxation for both light-on and light-off transients in the range of hours and days, (iii) a critical dependence of the photoresponse on the pre-illumination history of the sample, and (iv) a current–voltage hysteresis depending on both the illumination and the electrical-measurement conditions in a complex manner.

Lanthanide-doped strontium barium niobate (SBN) materials: A vibrational investigation

2008 ◽  
Vol 128 (5-6) ◽  
pp. 985-987 ◽  
Author(s):  
D. Kasprowicz ◽  
T. Runka ◽  
A. Speghini ◽  
D. Falcomer ◽  
J. García Solé ◽  
...  
Keyword(s):  
Strontium Barium Niobate ◽  
Strontium Barium
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