Holographic storage properties of BaTiO3

Krätzig, E.; Welz, F.; Orlowski, R.; Doormann, V.; Rosenkranz, Marco

doi:10.1016/0038-1098(80)91059-5

Cited by 65 publications

(10 citation statements)

References 7 publications

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“…The sample had been prepared from a crystal grown with 100 ppm Co in the melt for optoelectronics use. BaTiO 3 is very attractive as material for optical and holographic storage [6] and optical waveguides [7]. PAC studies in this material have been carried out with different nuclear probes for almost three decades, already [8][9][10].…”

Section: Methodsmentioning

confidence: 99%

Response of the Electric Field Gradient in Ion implanted BaTiO₃ to an External Electric Field

et al. 2000

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Single crystalline, ferroelectric BaTiO 3 as material with the highest piezoelectric constants among the perovskites with ordered sublattices was implanted with 111 In( 111 Cd). The electric field gradient at the Ti position was measured with perturbed γγ-angular correlation spectroscopy (PAC) while the crystal was exposed to an external electric field. A quadratic dependence could be observed: ν Q (E) = (34.8(1) + 0.16(4) E/kV/mm + 0.080(2) E 2 /kV 2 /mm 2 ) MHz. Point charge model calculations reproduce the linear change of V zz , but not the quadratic term. The polarizability of the host ions of BaTiO 3 is known to be nonlinear with respect to an electric field. The resulting quadratic shift of the electron density is reflected in the strength of the EFG.

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Section: Methodsmentioning

confidence: 99%

Response of the Electric Field Gradient in Ion implanted BaTiO₃ to an External Electric Field

et al. 2000

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“…Therefore, it is unlikely that the described axially symmetric signal in our samples is due to F þ centers. Previous studies 34,36,37 have attributed the axially symmetric signal near g ¼ 2.004 to singly ionized Ti vacancies in BaTiO 3 . The presence of charge-compensating Ti vacancies is consistent with Raman spectroscopy data, which show a narrow peak originating from the Ti-vacant octahedron.…”

Section: Electronic Paramagnetic Resonancementioning

confidence: 95%

“…1 The large values of the electrooptic coefficients and the remarkable holographic sensitivity of BT make it a promising material for applications in this field. 2,3 However, this material has some limitations that prevent its use in photorefractive devices designed for operating close to room temperature 4 because it is extremely difficult to grow as a monocrystal, presents very low growth rate, and has a tetragonal-orthorhombic phase transition that occurs at about 8 C.…”

mentioning

confidence: 99%

Structural and optical properties of rare earth–doped (Ba0.77Ca0.23)1−x(Sm, Nd, Pr, Yb)xTiO3

Moraes

Filho

Freire

et al. 2011

Journal of Applied Physics

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Enhanced dielectric and piezoelectric properties of xBaZrO3-(1−x)BaTiO3 ceramics J. Appl. Phys. 111, 084107 (2012) Combined experimental and theoretical study of the low temperature dielectric and magnetic properties of trivalent Eu ion doped SrTiO3 ceramics J. Appl. Phys. 111, 063529 (2012) The long range voice coil atomic force microscope Rev. Sci. Instrum. 83, 023705 (2012) Large area ceramic thin films on plastics: A versatile route via solution processing J. Appl. Phys. 111, 016106 (2012) Oxygen deficiency and grain boundary-related giant relaxation in Ba(Zr,Ti)O3 ceramics J. Appl. Phys. 110, 114110 (2011) Additional information on J. Appl. Phys. The pure and RE-doped BCT23 ceramics sintered at 1450 C in air for 4 h showed a dense microstructure in all ceramics. The use of RE ions as dopants introduced lattice-parameter changes that manifested in the reduction of the volume of the unit cell. RE-doped BCT23 samples exhibit a more homogenous microstructure due to the absence of a Ti-rich phase in the grain boundaries as demonstrated by scanning electron microscopy imaging. The incorporation of REs led to perturbations of the local symmetry of TiO 6 octahedra and the creation of a new Raman mode. The results of Raman scattering measurements indicated that the Curie temperature of the ferroelectric phase transition depends on the RE ion and ion content, with the Curie temperature shifting toward lower values as the RE content increases, with the exception of Yb 3þ doping, which did not affect the ferroelectric phase transition temperature. The phase transition behavior is explained using the standard soft mode model. Electronic paramagnetic resonance measurements showed the existence of Ti vacancies in the structure of RE-doped BCT23. Defects are created via charge compensation mechanisms due to the incorporation of elements with a different valence state relative to the ions of the pure BCT23 host. It is concluded that the Ti vacancies are responsible for the activation of the Raman mode at 840 cm À1 , which is in agreement with lattice dynamics calculations.

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“…This effect has been used to create amplitude masks in lithium niobate for information storage and retrieval 13,14 . In Ce:BaTiO 3 the light induced refractive index change, ∆n, has a nonlinear dependence on intensity [15][16][17] . In the event of low intensities the refractive index change will be small (∆n << n 0 ), and a Taylor expansion allows the refractive index to be expressed as:…”

Section: Evaluation Of the Effective Focal Length Of The Mediummentioning

confidence: 99%

Field propagation with nearly constant Gaussian beam parameters in unbiased self-defocusing photorefractive media

Jones

Jaatinen

2007

SPIE Proceedings

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Optical devices, where light controls light, are of interest to the computing and communications industries due to their potential to vastly improve information capacity and processing speed. One such device is an optical logic gate, based on the interactions of low divergence fields in photorefractive media. Presently, bright solitons in self-focusing photorefractive media offer one attractive possibility. A wide variety of other low divergence fields have also been outlined in recent literature, however, no theoretical model of a single bright soliton propagating in unbiased selfdefocusing photorefractive media is currently available.Evidence is presented of self-defocusing photorefractive media as an intensity dependent Gradient-Index (GRIN) lens with a negative power. Using this model, we outline conditions for the change in the complex beam parameter, and consequently the area and wavefront curvature, of the Gaussian beam to be minimised as it propagates through the selfdefocusing media. This is the first instance where self-defocusing photorefractive media has been modelled as an intensity dependent GRIN lens, and where a low divergence field propagating through unbiased self-defocusing media with a constant complex Gaussian beam parameter has been described.

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Holographic storage properties of BaTiO3

Cited by 65 publications

References 7 publications

Response of the Electric Field Gradient in Ion implanted BaTiO₃ to an External Electric Field

Response of the Electric Field Gradient in Ion implanted BaTiO₃ to an External Electric Field

Structural and optical properties of rare earth–doped (Ba0.77Ca0.23)1−x(Sm, Nd, Pr, Yb)xTiO3

Field propagation with nearly constant Gaussian beam parameters in unbiased self-defocusing photorefractive media

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Holographic storage properties of BaTiO3

Cited by 65 publications

References 7 publications

Response of the Electric Field Gradient in Ion implanted BaTiO3 to an External Electric Field

Response of the Electric Field Gradient in Ion implanted BaTiO3 to an External Electric Field

Structural and optical properties of rare earth–doped (Ba0.77Ca0.23)1−x(Sm, Nd, Pr, Yb)xTiO3

Field propagation with nearly constant Gaussian beam parameters in unbiased self-defocusing photorefractive media

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Response of the Electric Field Gradient in Ion implanted BaTiO₃ to an External Electric Field

Response of the Electric Field Gradient in Ion implanted BaTiO₃ to an External Electric Field