Acoustogyration diffraction of optical waves: case of SiO2 and TeO2 crystals

Martynyuk-Lototska, I.; Mys, O.; Akimov, S. V.; Krupych, O.; Vlokh, R.

doi:10.2478/s11772-010-0014-y

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…21,22 Diamond has a cubic structure and it belongs to the Fd3m(#227) space group, therefore, it is centrosymmetric. In solid crystals, the molecules or atoms are usually not chiral and so the circular birefringence is associated with the absence of a center of symmetry.…”

Section: Introductionmentioning

confidence: 99%

High pressure ellipsometry: A novel method for measuring the optical properties and electronic structure of materials in diamond anvil cells

Nissim

Eliezer²,

Bakshi³

et al. 2011

Review of Scientific Instruments

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High pressure ellipsometry (HPE) method was developed for determining the index of refraction of opaque materials in a diamond anvil cell (DAC). A main difficulty in DAC-based HPE, namely, the pressure-induced birefringence developed in the diamond, was overcome enabling the extraction of the ellipsometric parameters of the sample. The method used was based on the fact that an unpolarized light is unaffected by a retarding optical element and thus reduces the number of unknown parameters in the problem. Because of technical difficulties in using unpolarized light, a linear combination of orthogonal polarizations was applied. In the experimental procedure, multiangle measurements of the ellipsometric parameter ψ are collected at each pressure and the data is fitted together with a measurement of the near normal reflectivity, in order to extract the complex index of refraction. As a test case, this procedure was used to measure the high pressure index of refraction of iron up to 30 GPa for light with wavelengths of 532 and 633 nm. From the index of refraction as a function of pressure the diamond-iron interface emissivity for different pressures was derived and from which the phase transition α → ε could be identified and characterized. The emissivity increases with pressure both at the α (0-9 GPa) and the ε phase (21-30 GPa) however decreases at the mixed α - ε (9-21 GPa) range. From the imaginary part of the index of refraction the pressure dependence of the energy skin depth of iron was extracted. It was found that the energy skin depth increases by an order of magnitude at 30 GPa relative to ambient conditions.

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Section: Introductionmentioning

confidence: 99%

High pressure ellipsometry: A novel method for measuring the optical properties and electronic structure of materials in diamond anvil cells

Nissim

Eliezer²,

Bakshi³

et al. 2011

Review of Scientific Instruments

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“…In our recent works a new optical effect of acoustogyration diffraction has been predicted and described following from the standpoints of both electrodynamics and wave optics [1][2][3][4]. It has been sown that, in some particular cases, this effect manifests itself as collinear interaction between the longitudinal acoustic wave and (left-or right-handed) circularly polarised plane optical wave propagating along the optic axis in optically uniaxial crystals.…”

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confidence: 99%

“…As shown earlier by the authors [1][2][3][4], the diffraction efficiency  in the conditions of acoustogyration diffraction is determined by the relation…”

mentioning

confidence: 99%

“…In other words, we deal here with the spatial grating (or, in somewhat other terms, with spatial modulation) of the gyration tensor. In the particular case considered in the works [1][2][3][4], a collinear diffraction geometry for both the incident (the subscript 'in') and diffracted (the subscript 'd') light waves takes place, whereas the longitudinal acoustic (the subscript 'ac') wave propagates along the same direction …”

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confidence: 99%

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On the conservation of optical angular momentum at acoustogyration diffraction of light

Skab¹,

Vlokh²

2012

Ukr. J. Phys. Opt.

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Abstract.A phenomenon of acoustogyration diffraction of light is analysed from the viewpoint of conservation of orbital angular momentum. It is shown that the availability of optical angular momentum in the diffracted optical beam can be necessarily inferred from the requirements of angular-momentum conservation law. As follows from our analysis, circularly polarised diffracted wave should bear a doubly charged vortex, while its wave front should reveal a singularity typical of scalar fields. The efficiency of the spin-to-orbit momentum conversion is governed by the efficiency of acoustogyration diffraction of light.

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Spin-to-orbit conversion at acousto-optic diffraction of light: conservation of optical angular momentum

Skab

Vlokh

2012

Appl. Opt.

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Acousto-optic diffraction of light in optically active cubic crystals is analyzed from the viewpoint of conservation of optical angular momentum. It is shown that the availability of angular momentum in the diffracted optical beam can be necessarily inferred from the requirements of angular momentum conservation law. As follows from our analysis, a circularly polarized diffracted wave should bear an orbital angular momentum. The efficiency of the spin-to-orbit momentum conversion is governed by the efficiency of acousto-optic diffraction.

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Acoustogyration diffraction of optical waves: case of SiO2 and TeO2 crystals

Cited by 6 publications

References 17 publications

High pressure ellipsometry: A novel method for measuring the optical properties and electronic structure of materials in diamond anvil cells

High pressure ellipsometry: A novel method for measuring the optical properties and electronic structure of materials in diamond anvil cells

On the conservation of optical angular momentum at acoustogyration diffraction of light

Spin-to-orbit conversion at acousto-optic diffraction of light: conservation of optical angular momentum

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