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A. Niemer, R. Pankrath, K. Betzler, M. Burianek, M. Mühlberg:
Dielectric properties and the phase transition of pure and cerium doped calcium-barium-niobate.
World Journal of Concensed Matter Physics 2(2):80-84 (2012), DOI: 10.4236/wjcmp.2012.22014   Abstract  >>>

B. Andriyevsky, K. Doll, G. Cakmak, M. Jansen, A. Niemer, K. Betzler:
DFT-based ab initio study of structural and electronic properties of lithium fluorooxoborate LiB6O9F and experimentally observed second harmonic generation.
Phys. Rev. B 84:125112 (2011), DOI: 10.1103/PhysRevB.84.125112   Abstract  >>>

Urs Heine, Klaus Betzler, Manfred Burianek, Manfred Mühlberg:
The temperature dependence of the band edge energy in calcium barium niobate.
Phys. Status Solidi RRL 4:166-168 (2010), DOI: 10.1002/pssr.201004158   Abstract  >>>

Uwe Voelker, Kai Dinges, Urs Heine, Klaus Betzler:
Lengths of ferroelectric domains: the role of defects and random fields.
Phys. Rev. B 81:214104 (2010), DOI: 10.1103/PhysRevB.81.214104   Abstract  >>>

Isabella-Ioana Oprea, Uwe Voelker, Alexander Niemer, Rainer Pankrath, Sergey Podlozhenov, Klaus Betzler:
Influence of erbium doping on phase transition and optical properties of strontium barium niobate.
Optical Materials 32:30-34 (2009), DOI: 10.1016/j.optmat.2009.05.015   Abstract  >>>

Urs Heine, Uwe Voelker, Klaus Betzler, Manfred Burianek, Manfred Muehlberg:
The ferroelectric phase transition of calcium barium niobate: experimental evidence of Smolenskii’s model for diffuse phase transitions?.
New Journal of Physics 11:083021 (2009), DOI: 10.1088/1367-2630/11/8/083021   Abstract  >>>

Ä. Andresen, A.-N. Bahar, D. Conradi, I.-I. Oprea, R. Pankrath, U. Voelker, K. Betzler, M. Wöhlecke, U. Caldiño, E. Martín, D. Jaque and J. García Solé:
Spectroscopy of Eu3+ ions in congruent strontium barium niobate crystals.
Phys. Rev. B 77:214102 (2008), DOI: 10.1103/PhysRevB.77.214102   Abstract  >>>

C. David, A. Tunyagi, K. Betzler and M. Wöhlecke:
Compositional dependence of optical and vibrational properties of Strontium-Barium-Niobate (SrxBa1-xNb2O6).
phys. stat. sol. (b) 244:2127-2137 (2007), DOI: 10.1002/pssb.200642370   Abstract  >>>

Kunpeng Wang, Yuchen Ma, Klaus Betzler:
Defect-induced spin deterioration of La[sub 0.64]Sr[sub 0.36]MnO[sub 3]: Ab initio study.
Physical Review B (Condensed Matter and Materials Physics) 76:144431 (2007), DOI: 10.1103/PhysRevB.76.144431   Abstract  >>>

Uwe Voelker, Urs Heine, Christoph Gödecker, Klaus Betzler:
Domain size effects in a uniaxial ferroelectric relaxor system: The case of SrxBa1-xNb2O6.
Journal of Applied Physics 102:114112 (2007), DOI: 10.1063/1.2821754   Abstract  >>>

T. Volk, M. Wöhlecke, N. Rubinina:
Optical damage resistance in lithium niobate.
In Photorefractive Materials and their Applications 2 - Materials, Ed. P. Günter 114:165-203 (2007),   Abstract  >>>

B. Briat, V. G. Grachev, G. I. Malovichko, O. F. Schirmer, M. Wöhlecke:
Defects in Inorganic Photorefractive Materials and Their Investigations.
In Photorefractive Materials and their Applications 2 - Materials, Ed. P. Günter 114:9-49 (2007),   Abstract  >>>

M. P. Petrov, V. V. Bryksin M. Lemmer, B. Hilling, M. Wöhlecke, M. Imlau:
Interactions of optically generated space-charge waves with magnetic fields in semi-insulating InP:Fe single crystals.
PHYSICAL REVIEW B 75, 76:033202 (2007), DOI: 10.1103/PhysRevB.76.033202   Abstract  >>>

Uwe Voelker and Klaus Betzler:
Domain morphology from k-space spectroscopy of ferroelectric crystals.
Phys. Rev. B 74:132104 (2006), DOI: 10.1103/PhysRevB.74.132104   Abstract  >>>

Isabella-Ioana Oprea, Hartmut Hesse, and Klaus Betzler:
Luminescence of erbium-doped bismuth-borate glasses.
Opt. Mater. 28:1136-1142 (2006), DOI: 10.1016/j.optmat.2005.07.004   Abstract  >>>

Sergey Podlozhenov, Heribert A. Graetsch, Julius Schneider, Michael Ulex, Manfred Wöhlecke and Klaus Betzler:
Structure of strontium barium niobate SrxBa1-xNb2O6 (SBN) in the composition range 0.32 < x < 0.82.
Acta Cryst. B 62:960--965 (2006), DOI: 10.1107/S0108768106038869   Abstract  >>>

J. Schefer, D. Schaniel, V. Pomjakushin, U. Stuhr, V. Petricek, Th. Woike, M. Wöhlecke, M. Imlau:
Structural properties of Sr0.61Ba0.39Nb2O6 in the temperature range 10 to 500 K investigated by high-resolution neutron powder diffraction and specific heat measurements.
Phys. Rev. B 74:134103 (2006), DOI: 10.1103/PhysRevB.74.134103   Abstract  >>>

C. Merschjann, D. Berben, M. Imlau, M. Wöhlecke:
Evidence for Two-Path Recombination of Photoinduced Small Polarons in Reduced LiNbO3.
Phys. Rev. Lett. 96:186404 (2006), DOI: 10.1103/PhysRevLett.96.186404   Abstract  >>>

M. Goulkov, O. Fedorenko,Th. Woike, T. Granzow, M. Imlau, M. Wöhlecke:
Intensity dependent properties of photo-induced light scattering in ferroelectric Sr0.61Ba0.39Nb2O6:Ce.
J. Phys.: Condens. Matter 18:3037-3052 (2006), DOI: 10.1088/0953-8984/18/11/010   Abstract  >>>

Isabella-Ioana Oprea, Hartmut Hesse, and Klaus Betzler:
Infrared-to-visible upconversion luminescence in neodymium-doped bismuth-borate glass.
phys. stat. sol. (b) 242:R109 (2005), DOI: 10.1002/pssb.200541197   Abstract  >>>

T. Volk, D. Isakov, N. Ivanov, L. Ivleva, K. Betzler, A. Tunyagi, and M. Wöhlecke:
Study of ferroelectric domain switching by domain-wall induced light scattering.
J. Appl. Phys. 97:074102 (2005), DOI: 10.1063/1.1882772   Abstract  >>>

T. Volk, M. Wöhlecke:
Thermal fixation of the photorefractive holograms recorded in lithium niobate and related crystals.
Critical Reviews in Solid State and Materials Sciences 30:125-151 (2005), DOI: 10.1080/10408430500198631   Abstract  >>>

M. Goulkov, O. Fedorenko, L. Ivleva, Th. Woike, T. Granzow, M. Imlau, M. Wöhlecke:
Temperature-dependent coherent oscillation in photorefractive relaxor strontium barium niobate.
J. Opt. Soc. Am. B 22:1648 (2005),   Abstract  >>>

M. Goulkov, O. Fedorenko, L. Ivleva, M. Böttcher, Th. Woike, T. Granzow, M. Imlau, M. Wöhlecke:
Photorefractive parametric scattering in the ferroelectric relaxor SBN: Phenomenological and application aspects.
Phys. Rev. B 71:024104 (2005), DOI: 10.1103/PhysRevB.71.024104   Abstract  >>>

D. Xue, K. Betzler, H. Hesse, K. Kitamura, H. Ratajczak and J. Wang:
Search for new optical crystals by the chemical bond method.
J. Synthetic Crystals 33:605-612 (2004),   Abstract  >>>

D. Isakov, T. Volk, L. Ivleva, K. Betzler, C. David, A. Tunyagi and M. Wöhlecke:
Study of ferroelectric domain switching by domain-wall induced light scattering.
ZhETP-Letters 80:289 (2004),   Abstract  >>>

Michael Ulex, Rainer Pankrath, Klaus Betzler:
Growth of strontium barium niobate: the liquidus-solidus phase diagram.
J. Crystal Growth 271:128 (2004), DOI: 10.1016/j.jcrysgro.2004.07.039   Abstract  >>>

Isabella-Ioana Oprea, Hartmut Hesse, Klaus Betzler:
Optical properties of bismuth borate glasses.
Opt. Mat. 26:235 (2004), DOI: 10.1016/j.optmat.2003.10.006   Abstract  >>>

C. David, T. Granzow, A. Tunyagi, M. Wöhlecke, Th. Woike, K. Betzler, M. Ulex, M. Imlau, and R. Pankrath:
Composition dependence of the phase transition temperature in SrxBa1-xNb2O6.
phys. stat. sol. (a) 201:R49 (2004), DOI: 10.1002/pssa.200409044   Abstract  >>>

C. David, A. Tunyagi, M. Ulex, M. Wöhlecke, K. Betzler, K. Lengyel, L. Kovács:
Structure of the OH- stretching vibrational band in SrxBa1-xNb2O6.
J. Appl. Phys. 95:5522 (2004), DOI: 10.1063/1.1712011   Abstract  >>>

C. Bäumer, C. David, K. Betzler, H. Hesse, K. Lengyel, L. Kovács, M. Wöhlecke:
Composition Dependence of the OH-Stretch-Mode Spectrum in Lithium Tantalate.
phys. stat. sol. (a) 201:R13 (2004), DOI: 10.1002/pssa.200409028   Abstract  >>>

H. Sreemoolanadhan, M. T. Sebastian, R. Ratheesh, R. Blachnik, M. Woehlecke, B. Schneider, M. Neumann, P. Mohanan:
Microwave dielectric properties of BaO-2CeO2-nTiO2 ceramics.
J. Sol. St. Chemistry 177:3995 (2004),   Abstract  >>>

D. Schaniel, Th. Woike, G. Weckwerth, J. Schefer, M. Imlau, M. Wöhlecke, R. Pankrath:
Valence sensitive determination of the doping concentration in Sr0.61Ba0.39Nb2O6 doped with Cr3+ and Ce3+ from magnetization measurements.
Phys. Rev. B 70:144410 (2004), DOI: 10.1103/PhysRevB.70.144410   Abstract  >>>

U. Dörfler, T. Granzow, Th. Woike, M. Wöhlecke, R. Pankrath, M. Imlau:
Intensity and wavelength dependence of the photoconductivity in Cr-doped Sr0.61Ba0.39Nb2O6.
Eur. Phys. J. B 38:19-24 (2004), DOI: 10.1140/epjb/e2004-00094-0   Abstract  >>>

T. Volk, D. Isakov, V. Salobutin, L. Ivleva, P. Lykov, V. Ramzaev, M. Wöhlecke:
Effects of Ni doping on properties of strontium-barium-niobate crystals.
Sol. St. Commun. 130:223-226 (2004),   Abstract  >>>

T. Granzow, Th. Woike, M. Wöhlecke, M. Imlau, W. Kleemann:
Change from 3D-Ising to Random Field-Ising-Model Criticality in a Uniaxial Relaxor Ferroelectric.
Phys. Rev. Lett. 92:065704 (2004), DOI: 10.1103/PhysRevLett.92.065701   Abstract  >>>

U. Dörfler, T. Granzow, Th. Woike, M. Wöhlecke, R. Pankrath and M. Imlau:
Aging of the ferroelectric hysteresis in Ce-doped Strontium-Barium-Niobate observed by holographic phase gratings.
Appl. Phys. B 78:211-215 (2004), DOI: 10.1007/s00340-003-1351-z   Abstract  >>>

Arthur R. Tunyagi, Michael Ulex, Klaus Betzler:
Non-collinear optical frequency doubling in strontium barium niobate.
Phys. Rev. Lett. 90:243901 (2003), DOI: 10.1103/PhysRevLett.90.243901   Abstract  >>>

Ch. Bäumer, C. David, A. Tunyagi, K. Betzler, H. Hesse, E. Krätzig, M. Wöhlecke:
Composition dependence of the ultraviolet absorption edge in lithium tantalate.
J. Appl. Phys. 93:3102 (2003), DOI: 10.1063/1.1542689   Abstract  >>>

K.-U. Kasemir, K. Betzler:
Detecting ellipses of limited eccentricity in images with high noise levels.
Image and Vision Computing 21:221 (2003),   Abstract  >>>

M. Goulkov, O. Shinkarenko, L. Ivleva, P. Lykov, T. Granzow, Th. Woike, M. Imlau, M. Wöhlecke:
New Parametric Scattering in Photorefractive Sr0.61Ba0.39Nb2O6:Cr.
Phys. Rev. Lett. 91:243903 (2003),   Abstract  >>>

T. Volk, D. Isakov, L. Ivleva, M. Wöhlecke:
Ferroelectric switching of strontium-barium-niobate crystals in pulsed fields.
Appl. Phys. Lett. 83:2220 (2003),   Abstract  >>>

T. Granzow, Th. Woike, W. Rammensee, M. Wöhlecke, M. Imlau, R. Pankrath:
Influence of Ce and Cr doping on the pyroelectric behaviour of Sr0.61Ba0.39Nb2O6.
. stat. solidi (a) 197:R2-R4 (2003),   Abstract  >>>

T. Volk, B. Maximov, S. Sulyanov, N. Rubinina, M. Woehlecke:
Relation of the photorefracton and optical-damage resistance to the intrinsic defect structure in LiNbO3 crystals.
Optical Materials 23:229-233 (2003),   Abstract  >>>

D. Xue, K. Betzler, H. Hesse:
Chemical bond analysis of the nonlinear optical properties of the borate crystals LiB3O5, CsLiB6O10, and CsB3O5.
Applied Physics A 74:779 (2002),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse, H. Ratajczak:
Chemical bond analysis on second order nonlinear optical properties of Na2SeO4.H2SeO3.H2O.
Bulletin of the Polish Academy of Sciences-Chemistry 50:289 (2002),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse, D. Lammers:
Linear and nonlinear optical susceptibilities of orthorhombic rare earth molybdates RE2(MoO4)3.
J. Phys. Chem. Solids 63:359 (2002),   Abstract  >>>

T. Granzow, Th. Woike, M. Wöhlecke, M. Imlau, and W. Kleemann:
Polarization-Based Adjustable Memory Behavior in Relaxor Ferroelectrics.
Phys. Rev. Lett. 89:127601 (2002),   Abstract  >>>

V. Szalay, L. Kovács, M. Wöhlecke, E. Libowitzky:
Stretching potential and equilibrium length of the OH bond in solids.
Chem. Phys. Letters 354:56 - 61 (2002),   Abstract  >>>

T. Granzow, U. Dörfler, Th. Woike, M. Wöhlecke, R. Pankrath, M. Imlau ,W. Kleemann:
Local electric-field-driven repoling reflected in the ferroelectric polarization of Ce-doped Sr0.61Ba0.39Nb2O6..
Appl. Phys. Letters 80:470 - 472 (2002),   Abstract  >>>

T. Granzow, U. Dörfler, Th. Woike, M. Wöhlecke, R. Pankrath, M. Imlau ,W. Kleemann:
Evidence of random electric fields in the relaxor-ferroelectric Sr0.61Ba0.39Nb2O6.
Europhysics Letters 57:597 - 603 (2002),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse, H. Ratajczak:
Theoretical analysis of the chemical bonding behavior and the dielectric properties of different phases of ice.
Bulletin of the Polish Academy of Sciences-Chemistry 49:289 (2001),   Abstract  >>>

D.Xue, K. Betzler:
Influence of optical-damage resistant dopants on the nonlinear optical properties of lithium niobate.
Applied Physics B 72:641 (2001),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Induced Li-site vacancies and nonlinear optical behavior of doped lithium niobate crystals.
Optical Materials 16:381 (2001),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Second order nonlinear optical properties of In-doped lithium niobate.
J. Appl. Phys. 89:849 (2001),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse, D. Lammers:
Temperature dependence of the dielectric response of lithium niobate.
J. Phys. Chem. Solids 62:973 (2001),   Abstract  >>>

V. V. Gladkii, V. A. Kirikov, E. V. Pronina, T. R. Volk, R. Pankrath, M. Wöhlecke:
Anomalies in the Slow Polarisation Kinetics of a Ferroelectric relaxor in the Temperature Region of a Diffuse Phase Transition.
Physics of the Solid State 43:2140-2145 (2001),   Abstract  >>>

T. Volk, L. Ivleva , P. Lykov, D. Isakov, V. Osiko, M. Wöhlecke:
Modification of the optical and photorefractive properties of Ce-doped strontium-barium niobate by co-doping with a nonphotorefractive La impurity.
Appl. Phys. Letters 79:854 (2001),   Abstract  >>>

T. Volk, L. Ivleva, P. Lykov, N. Pollok, V. Salobutin, R. Pankrath, M. Wöhlecke:
Effects of rare-earth impurity doping on the ferroelectric and photorefractive properties of strontium-barium niobate crystals.
Optical Materials 18:179 (2001),   Abstract  >>>

Th. Woike, T. Granzow, U. Dörfler, Ch. Poetsch, M. Wöhlecke, R. Pankrath:
Refractive Indices of congruently melting Sr0.61Ba0.39Nb2O6.
phys. stat. sol. (a) 186:R 13 (2001),   Abstract  >>>

M. Wöhlecke, L. Kovács:
OH- ions in Oxide Crystals.
Critical Reviews in Solid State and Materials Sciences 26:1 - 86 (2001),   Abstract  >>>

T. Granzow, U. Dörfler, Th. Woike, M. Wöhlecke, R. Pankrath, M. Imlau, W. Kleemann:
Influence of pinning effects on the ferroelectric hysteresis in cerium-doped SrxBa1-xNb2O6.
Phys. Rev B 63:174101 (2001),   Abstract  >>>

T. Volk, B. Maximov, T. Chernaya, N. Rubinina, M. Wöhlecke, V. Simonov:
Photorefractive Properties of LiNbO3:Zn Crystals Related to the Defect Structure.
Appl. Phys. B 72:647 (2001),   Abstract  >>>

Th. Woike, U. Dörfler, L. Tsankov, G. Weckwerth, D. Wolf, M. Wöhlecke, T. Granzow, R. Pankrath, M. Imlau, W. Kleemann:
Photorefractive properties of Cr-doped Sr0.61Ba0.39Nb2O6 related to crystal purity and doping concentration.
Appl. Phys. B 72:661 (2001),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Dielectric properties of I-III-VI2 type chalcopyrite semiconductors.
Physical Review B15 62:13546 (2000),   Abstract  >>>

D. Lammers, K. Betzler, D. Xue, J. Zhao:
Optical Second-Harmonic Generation in Benzophenone.
physica status solidi (a) 180:R5 (2000),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Chemical bond analysis of the second order nonlinear optical behavior of Zn-doped lithium niobate.
Optics Communications 182:167 (2000),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Dielectric properties of lithium niobate-tantalate crystals.
Solid State Communications 115:581 (2000),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Chemical bond analysis of the second order nonlinear optical behavior of Mg-doped lithium niobate.
J. Phys.: Condens. Matter 12:6245 (2000),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse, D. Lammers:
Nonlinear optical properties of borate crystals.
Solid State Communications 114:21 (2000),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Dielectric constants of binary rare-earth compounds.
J. Phys.: Condens. Matter 12:3113 (2000),   Abstract  >>>

D.Xue, K. Betzler, H. Hesse:
Structural characteristics and second order nonlinear optical properties of borate crystals.
Trends in Optics and Photonics Series 34:542 (2000),   Abstract  >>>

D. Xue, K. Betzler, H. Hesse, D. Lammers, S. Zhang:
Theoretical studies of nonlinear optical properties of compounds K4Ln2(CO3)3F4 (Ln=Pr, Nd, Sm, Eu, Gd).
J. Appl. Physics 87:2849 (2000),   Abstract  >>>

K. Betzler, H. Hesse, R. Jaquet, D. Lammers:
Optical second-harmonic generation in lead formate.
J. Appl. Physics 87:22 (2000),   Abstract  >>>

M. Meyer, M. Wöhlecke, O. F. Schirmer:
On the temperature dependence of the band edge of Sr0.61Ba0.39Nb2O6.
. stat. sol. (b) 221:R 1 (2000),   Abstract  >>>

R. Ratheesh, M. Wöhlecke, B. Berge, Th. Wahlbrink, H. Haeuseler, E. Rühl, R. Blachnik, P. Balan, N. Santha, M. T. Sebastian:
Raman study of the ordering in Sr(B'0.5Nb0.5)O3 compounds.
J. Appl. Phys. 88:2813 (2000),   Abstract  >>>

T. R. Volk, V. Yu. Salobutin, L. I. Ivleva, N. M. Polozkov, R. Pankrath, and M. Wöhlecke:
Ferroelectric Properties of Strontium Barium Niobate Crystals Doped with Rare-Earth Metals.
Physics of the Solid State 42:2129-2136 (2000),   Abstract  >>>

D. Xue, K. Betzler, H. Hesse, D. Lammers:
Relationship between Dielectric Responses and Constituent Atoms in Crystal Materials.
physica status solidi (b) R7:216 (1999),   Abstract  >>>

D. Xue, K. Betzler, H. Hesse, D. Lammers:
Origin of the Large Nonlinear Optical Coefficients in Bismuth Borate BiB3O6.
physica status solidi (a) 176/2:R1 (1999),   Abstract  >>>

K.-U. Kasemir, K. Betzler:
Characterization of photorefractive materials by spontaneous noncolinear frequency doubling.
Applied Physics B 68:763 (1999),   Abstract  >>>

Chr. a. d. Horst, K.-U. Kasemir, K. Betzler:
Determination of Homogeneity of Pure and Doped Lithium Niobate by SHG Temperature Phase-Matching.
J. Appl. Physics 84:5158 (1998),   Abstract  >>>

K. Kasemir, K. Betzler, B. Matzas, B. Tiegel, T. Wahlbrink, M. Wöhlecke, B. Gather, N. Rubinina, T. Volk:
Influence of Zn/In Codoping on the Optical Properties of Lithium Niobate.
J. Appl. Physics 84:5191 (1998),   Abstract  >>>

K. Kasemir, K. Betzler, B. Matzas, B. Tiegel, M. Wöhlecke, N. Rubinina, T. Volk:
Influence of In Doping on the Refractive Indices of Lithium Niobate.
physica status solidi (a) 166/1:R7 (1998),   Abstract  >>>

K. Chah, M. Aillerie, M. D. Fontana, G. I. Malovichko, K. Betzler, E. Kokanyan:
Influence of chromium doping on the electro-optic properties of lithium niobate.
Optics Commun. 136:231 (1997),   Abstract  >>>

A. Reichert, K. U. Kasemir, K. Betzler:
Application of noncolinear frequency doubling for crystal characterization.
Materials Science Forum 239-241:329 (1997),   Abstract  >>>

M. Wöhlecke, G. Corradi, K. Betzler:
Optical Methods to Characterise the Composition and Homogeneity of Lithium Niobate Single Crystals.
Applied Physics B 63:323 (1996),   Abstract  >>>

A. Reichert, K. Betzler:
Induced noncolinear frequency doubling: A new characterization technique for electrooptic crystals.
J. Appl. Phys. 79:2209 (1996),   Abstract  >>>

U. Schlarb, B. Matzas, A. Reichert, K. Betzler, M. Wöhlecke, B. Gather, T. Volk:
Refractive indices of Zn/In-co-doped lithium niobate.
Ferroelectrics 185:269 (1996),   Abstract  >>>

A. Reichert, K. U. Kasemir, K. Betzler:
Crystal characterization by noncolinear frequency doubling.
Ferroelectrics 184:21 (1996),   Abstract  >>>

T. Volk, M. Wöhlecke, N. Rubinina, A. Reichert, and N. Razumovski:
Optical-damage-resistant impurities (Mg, Zn, In, Sc) in lithium niobate.
Ferroelectrics 183:291 (1996),
Abstract: The paper reviews the results of recent studies of optical-damage-resistant LiNbO3:Me crystals, with Me substituting for Mg, Zn, In, Sc. The effects of Me ions on LiNbO3 are very similar. This similarity manifests itself drastically in photorefractive, optical and nonlinear optical properties. The resemblance of these effects is due to a common influence of Me impurities on the intrinsic lattice defects NbLi. (Close Abstract <<<)

U. Schlarb, A. Reichert, K. Betzler, M. Wöhlecke, B. Gather, T. Volk, N. Rubinina:
SHG phase matching conditions for undoped and doped lithium niobate.
Rad. Effects and Defects in Solids 136(1-4):1029 (1995),   Abstract  >>>

U. Schlarb, M. Wöhlecke, B. Gather, A. Reichert, K. Betzler, T. Volk, N. Rubinina:
Refractive indices of Zn-doped lithium niobate.
Optical Materials 4:791 (1995),   Abstract  >>>

T. Volk, M. Wöhlecke, A. Reichert, F. Jermann, and N. Rubinina:
The peculiar impurity concentration ranges in damage resistant LiNbO3 crystals doped with Mg, Zn, In, and Sc.
Ferroelectrics Letters 20:97 (1995),   Abstract  >>>

F. Kahmann, A. Reichert, K. Lytze, R. Blachnik, K. Betzler, R. Rupp:
Photorefractive effect in Cd13P4S22I2.
Phys. Rev. B 52:870 (1995),   Abstract  >>>

U. Schlarb, K. Betzler:
Influence of the defect structure on the refractive indices of undoped and Mg-doped lithium niobate.
Phys. Rev. B 50:751 (1994),   Abstract  >>>

U. Schlarb, B. Sugg:
Refractive index of terbium gallium garnet.
Phys. stat. sol. (b) 182:K91 (1994),   Abstract  >>>

U. Schlarb, K. Betzler:
A generalized Sellmeier equation for the refractive indices of lithium niobate.
Ferroelectrics 156:99 (1994),   Abstract  >>>

A. Reichert, K. Betzler:
Non-colinear frequency doubling in lithium niobate.
Ferroelectrics 156:93 (1994),   Abstract  >>>

U. Schlarb and K. Betzler:
Refractive indices of lithium niobate as a function of temperature, wavelength, and composition: A generalized fit.
Phys. Rev. B 48:15613 (1993),   Abstract  >>>

U. Schlarb, S. Klauer, M. Wesselmann, K. Betzler and M. Wöhlecke:
Determination of the Li/Nb Ratio in Lithium Niobate by Means of Birefringence and Raman Measurements.
Appl. Phys. A 56:311 (1993),   Abstract  >>>

U. Schlarb and K. Betzler:
Refractive indices of lithium niobate as a function of wavelength and composition.
J. Appl. Phys. 73:3472 (1993),   Abstract  >>>

G. I. Malovichko, V. G. Grachev, E. P. Kokanyan, O. F. Schirmer, K. Betzler, B. Gather, F. Jermann, S. Klauer, U. Schlarb, and M. Wöhlecke:
Characterization of stoichiometric LiNbO3 grown from melts containing K2O.
Appl. Phys. A 56:103 (1993),   Abstract  >>>

U. Schlarb, K. Betzler:
Interferometric measurement of refractive indices of LiNbO3.
Ferroelectrics 126:39 (1992),   Abstract  >>>

A. Reichert, K. Betzler:
Characterization of electrooptic crystals by non-collinear frequency doubling.
Ferroelectrics 126:9 (1992),   Abstract  >>>

N. Schmidt, P. Voigt, B. Hellermann, K. Betzler, H. Hesse, S. Kapphan:
Phase matching for second harmonic generation in KNbO3:Ta crystals with Nd:YAG- and GaAs-laser wavelengths.
Journal of Applied Physics 69:3426 (1991),   Abstract  >>>

N. Schmidt, P. Voigt, B. Hellermann, K. Betzler, H. Hesse, S. Kapphan:
Frequency doubling of YAG- and GaAs-lasers by KNbO3:Ta crystals.
Radiation Effects and Defects in Solids 119-121:281 (1991),   Abstract  >>>

N. Schmidt, K. Betzler, B. C. Grabmaier:
Composition dependence of the second-harmonic phase-matching temperature in LiNbO3.
Applied Physics Letters 58:34 (1991),   Abstract  >>>

P. Voigt, K. Betzler, N. Schmidt, S. Kapphan:
Second harmonic generation study of field-induced changes in the phase transition of K1-xLixTaO3.
Ferroelectrics 106:149 (1990),   Abstract  >>>

N. Schmidt, K. Betzler, M. Grabs, S. Kapphan, F. Klose :
Spatially resolved second-harmonic generation investigations of proton-induced refractive index changes in LiNbO3.
J. Appl. Phys. 65:1253 (1989), DOI: 10.1063/1.343018   Abstract  >>>

K. Betzler, A. Gröne, N. Schmidt, P. Voigt :
Interferometric measurement of refractive indices.
Rev. Sci. Instr. 59:652 (1988), DOI: 10.1063/1.1139853   Abstract  >>>

K. Betzler, B. Hellermann, H. Hesse :
Influence of the dielectric constant anisotropy on the poling of ferroelectrics .
Ferroelectrics Letters 7:143 (1987), DOI: 10.1080/07315178708200543   Abstract  >>>

N. Schmidt, K. Betzler, S. Kapphan:
Spatially resolved second harmonic generation and interferometric investigations of LiNbO3 crystals.
Cryst. Latt. Def. and Amorph. Mat. 15:103 (1987),   Abstract  >>>

M. Grabs, K. Betzler, S. Kapphan:
Optical second harmonic measurements on KTaO3:Li .
Ferroelectrics Letters 2:41 (1984), DOI: 10.1080/07315178408202432   Abstract  >>>

L. Schüler, K. Betzler, H. Hesse, S. Kapphan:
Phase-matched second harmonic generation in potassium malate.
Opt. Commun. 43:157 (1982), DOI: 10.1016/0030-4018(82)90112-2   Abstract  >>>

K. Betzler:
Second harmonic generation near the phase transition of SrTiO3.
Ferroelectrics 26:819 (1980), DOI: 10.1080/00150198008008179   Abstract  >>>

K. Betzler, D. Bäuerle:
Second-harmonic generation in “Cubic” PLZT ceramics.
Appl. Phys. A 18:271 (1979), DOI: 10.1007/BF00885513   Abstract  >>>

K. Betzler, D. Bäuerle:
Second harmonic generation in squaric acid.
Phys. Letters A 70:153 (1979), DOI: 10.1016/0375-9601(79)90054-9   Abstract  >>>

K. Betzler, H. Hesse, P. Loose:
Optical second harmonic generation in organic crystals: urea and ammonium-malate.
J. Molecular Structure 47:393 (1978), DOI: 10.1016/0022-2860(78)87207-X   Abstract  >>>

P. Loose, K. Betzler, D. Bäuerle, S. Kapphan:
Rayleigh scattering near the paraelectric-ferroelectric phase transition in BaTiO3.
Proc. Int. Conf. Lattice Dynamics, Flammarion :681 (1978),   Abstract  >>>

K. Betzler, H. Hesse, P. Loose:
Optical second harmonic generation in ammonium malate.
Opt. Commun. 22:66 (1977), DOI: 10.1016/0030-4018(77)90248-6   Abstract  >>>

D. Bäuerle, K. Betzler, H. Hesse, S. Kapphan, P. Loose:
Phase-matched second harmonic generation in urea.
phys. stat. sol. (a) 43:K119 (1977), DOI: 10.1002/pssa.2210420254   Abstract  >>>

A. L. Karuzskii, K. Betzler, B. G. Zhurkin,W. P. Aksenov:
Magnetooscillations of the EHD luminescence in As-doped Ge.
Molecular spectroscopy of dense phases, Elsevier Amsterdam :139 (1976),   Abstract  >>>

K. Betzler, B. G. Zhurkin, A. L. Karuzskii, B. M. Balter:
Magnetooscillations of the electron-hole drop luminescence in germanium.
J. Luminescence 12-13:651 (1976), DOI: 10.1016/0022-2313(76)90156-3   Abstract  >>>

Klaus Betzler:
Auger recombination in the electron-hole drops in Si and Ge .
Lecture Notes in Physics - Physics of Highly Excited States in Solids 57:211 (1976), DOI: 10.1007/3-540-07991-2   Abstract  >>>

K. Betzler, B. G. Zhurkin, A. L. Karuzskii:
Magnetic-field dependent intensity oscillations of the EHD luminescence in pure germanium.
Sol. State Commun. 17:577 (1975),   Abstract  >>>

K. Betzler, R. Conradt:
Two-electron band to band transitions in silicon.
Sol. State Commun. 17:823 (1975),   Abstract  >>>

K. Betzler, B. G. Zhurkin, A. L. Karuzskii:
Magnetooscillations of the EHD TA-Line in Pure Germanium.
phys. stat. sol. (b) 70:K109 (1975), DOI: 10.1002/pssb.2220700247   Abstract  >>>

K. Betzler, B. G. Zhurkin, A. L. Karuzskii:
Magnetic field dependent intensity oscillations of the EHD luminescence in pure germanium.
Series of Selected Papers in Physics: Electron-Hole Drops (Phys. Soc. Jap.) :108 (1975),   Abstract  >>>

A. L. Karuzskii, K. Betzler, B. G. Zhurkin, B. M. Balter:
Magnitnie oszilljazii poluschirini linii ljumineszenzii EDK w tschistom germanii.
Zh. Eks. Teor. Fis. 69:1088 (1975),   Abstract  >>>

A. L. Karuzskii, K. Betzler, B. G. Zhurkin,W. P. Aksenov:
Magnitnie oszilljazii ljumineszenzii elektronno-dirotschnich kapel w germanii c primes’ju misch’jaka.
Fiz. Tverd. Tela 17:3104 (1975),   Abstract  >>>

A. L. Karuzskii, K. Betzler, B. G. Zhurkin, B. M. Balter:
Magnitnie oszilljazii wremeni schisni elektronno-dirotschnich kapel w tschistom Ge.
Pis’ma w ZhETF 22:65 (1975),   Abstract  >>>

P. S. Gladkov, K. Betzler, B. G. Zhurkin, A. L. Karuzskii.:
Spektralnaja sawisimost magnitnich oszilljazii intensiwnosti ljumineszenzii EDK w tschistom Ge.
Zh. Eks. Teor. Fis. 69:2199 (1975),   Abstract  >>>

K. Betzler:
Relaxation of Auger-excited carriers in silicon.
Sol. State Commun. 15:1837 (1974),   Abstract  >>>

W. Zeh, K. Betzler, R. Conradt:
Two-electron transitions in germanium.
Sol. State Commun. 14:967 (1974),   Abstract  >>>

Klaus Betzler:
Untersuchung von Zwei-Elektronen-Rekombinations-Prozessen in Halbleitern mit indirekter Bandstruktur.
Dissertation Universität Stuttgart : (1974),   Abstract  >>>

K. Betzler, R. Conradt:
Two-electron transitions in germanium.
Sol. State Commun. 10:79 (1972),   Abstract  >>>

K. Betzler, R. Conradt:
Two-electron transitions in the condensed phase of nonequilibrium carriers in Si.
Phys. Rev. Lett. 28:1562 (1972), DOI: 10.1103/PhysRevLett.28.1562   Abstract  >>>

K. Betzler, T. Weller, R. Conradt:
Two-Electron Band-to-Band Transitions in Solids.
Phys. Rev. B 6:1394 (1972), DOI: 10.1103/PhysRevB.6.1394   Abstract  >>>

K. Betzler, R. Conradt:
Radiative two-electron transitions in the electron-hole plasma in silicon at 2 K.
Proc. Int. Conf. Sem. Warsaw :684 (1972),   Abstract  >>>

K. Betzler, T. Weller, R. Conradt:
Improvement of photon counting by means of a pulse height analyzer.
Rev. Sci. Instr. 42:1594 (1971),   Abstract  >>>

K. Betzler, T. Weller, R. Conradt:
Experimental evidence of two-electron transitions in solids.
Phys. Rev. Lett. 26:640 (1971), DOI: 10.1103/PhysRevLett.26.640   Abstract  >>>

Klaus Betzler:
Photonenemission oberhalb der Bandkante von Halbleitern.
Diplomarbeit Universität Stuttgart : (1971),   Abstract  >>>

 

Letzte Bearbeitung: 2010-12-13 - Klaus Betzler