Appearance of optical singularities at the light propagation through glasses with residual stresses

Krupych, O.; Vasylkiv, Yu; Kvasnyuk, O.; Skab, I.; Vlokh, R.

doi:10.3116/16091833/13/4/170/2012

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…torsion or bending of material rods, whenever the dislocations of crystalline structures are available [10,11]. Moreover, the TDs of OI orientation can appear in transparent glasses characterized by residual mechanical stresses [12]. It is interesting that similar TDs have been detected in the work [13].…”

Section: Introductionmentioning

confidence: 87%

Identification of the topological defects of optical indicatrix orientation in CaB₄O₇glasses

Vasylkiv¹,

Skab²,

Vlokh³

2016

J. Opt.

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We develop an experimental method for the identification of the topological defects of optical indicatrix orientation, which appear in glass samples with residual mechanical stresses. The criteria needed to determine the sign of the strength of topological defects are formulated. The method is verified on the example of a non-annealed CaB4O7 glass sample that manifests spatially inhomogeneous residual stresses. We have found that at least seven topological defects of optical indicatrix orientation exist under the condition when a light beam propagates through a parallelepiped-shaped glass sample. The strengths of all the defects detected by us are equal to +1/2.

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Section: Introductionmentioning

confidence: 87%

Identification of the topological defects of optical indicatrix orientation in CaB₄O₇glasses

Vasylkiv¹,

Skab²,

Vlokh³

2016

J. Opt.

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“…For example, optical polarization singularities are successfully created using torsion of crystals, their bending [9][10][11], or loading of transparent crystalline disks compressed along their diameters [12]. It has also been found that optical polarization singularities are imposed by structural dislocations existing in crystals or by residual stresses available in glass materials [13]. Moreover, singularities with the strength of topological defects equal to ½ can be induced by conically shaped electric field via the Pockels effect [14].…”

Section: Introductionmentioning

confidence: 99%

Efficient materials for spin-to-orbit angular momentum conversion using bending technique

Vasylkiv¹,

Smaga²,

Skab³

et al. 2013

Ukr. J. Phys. Opt.

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Abstract. We analyze the efficiency of different materials used for spin-to-orbit angular momentum conversion by applying bending to parallelepiped-shaped bars made of crystals or glasses. It is found that generation of pure screw dislocations of the light wave front with the bending technique is possible only in isotropic materials and crystals belonging to hexagonal and trigonal symmetries, with exception of crystals of the point symmetry groups 3, 3 , 6, 6 and 6/m. We demonstrate that lexan is the most efficient material for generating optical vortex beams that bear orbital angular momentum, using the bending technique. This material reveals the highest figure of merit,

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Topological defects of optical indicatrix orientation in stressed glasses: spatial distribution of optical anisotropy parameters

et al. 2014

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We have revealed topological defects (TDs) of the angle of optical indicatrix (OI) orientation in a glass Li2B4O7 sample, which originate from the specific spatial distribution of optical birefringence caused by residual mechanical stresses. It has been found that the strength of TDs of the OI rotation angle is equal to ±1/2. Following from the experimental results, we have shown that the regions around the TDs of OI orientation are those of a 3D stressed state. We have formulated criteria for determining whether 2D or 3D distributions of the optical anisotropy parameters appear, based on the TDs of OI orientation. It has been shown that, in some particular cases, the regions with the TDs can testify the availability of a 2D stressed state. Besides, we have demonstrated experimentally that the TDs can appear for more than one projection in the case of 3D distributions of the OI parameters, which appear under bending of glass plates by a distributed load.

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Appearance of optical singularities at the light propagation through glasses with residual stresses

Cited by 3 publications

References 16 publications

Identification of the topological defects of optical indicatrix orientation in CaB₄O₇glasses

Identification of the topological defects of optical indicatrix orientation in CaB₄O₇glasses

Efficient materials for spin-to-orbit angular momentum conversion using bending technique

Topological defects of optical indicatrix orientation in stressed glasses: spatial distribution of optical anisotropy parameters

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Appearance of optical singularities at the light propagation through glasses with residual stresses

Cited by 3 publications

References 16 publications

Identification of the topological defects of optical indicatrix orientation in CaB4O7glasses

Identification of the topological defects of optical indicatrix orientation in CaB4O7glasses

Efficient materials for spin-to-orbit angular momentum conversion using bending technique

Topological defects of optical indicatrix orientation in stressed glasses: spatial distribution of optical anisotropy parameters

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Product

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Identification of the topological defects of optical indicatrix orientation in CaB₄O₇glasses

Identification of the topological defects of optical indicatrix orientation in CaB₄O₇glasses