An Experimental Study of Ultra-Wide-Band and Ultra-Wide-Aperture Non-Collinear Acousto-Optic Diffraction in an Optically Biaxial Potassium Arsenate Titanyl Crystal

Milkov, M.G.; Voloshinov, V. B.; Isaenko, L. I.; Vedenyapin, V.

doi:10.3103/s0027134918010113

Cited by 8 publications

(2 citation statements)

References 7 publications

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“…As an example, a collinear AO interaction in gyrotropic crystals has been investigated theoretically in the works [1,2]. The studies [3,4] have been devoted to the AO Bragg diffraction under conditions of light propagation close to one of the optic axes. It has been shown that, using this AO interaction type, one can construct ultra-wide-aperture and ultra-wideband acousto-optic deflectors to control optical radiation.…”

Section: Introductionmentioning

confidence: 99%

Tracking of optic axis with an acousto-optically diffracted beam: generation of vector-vortex beam in triglycine sulfate crystals

Krupych¹,

Kostyrko²,

Adamenko³

et al. 2020

Ukr. J. Phys. Opt.

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We analyze acousto-optic interactions for the case when a divergent diffracted optical beam propagates along one of the optic axes in biaxial crystals. We demonstrate that the diffracted beam reveals a specific spatial distribution of polarization states and transfers an optical vector-vortex field. It can be referred to as an optical vector-vortex beam with inseparable polarization and spatial states. At least intra-system entanglement occurs between different degrees of freedom, which are represented by the spin and orbit angular momentums in our case. The spatial orientation of the beam can be controlled while changing the angle between the optic axes. This is achieved by tuning the wavelength of optical radiation and the acoustic wave frequency. We have performed basic calculations using a particular example of optically biaxial triglycine sulfate crystals and assuming that the initial acoustic wave frequency amounts to 50 MHz and the light wavelength changes from 400 to 675 nm. Then the resulting acoustic frequency can increase up to 133 MHz for the longitudinal acoustic mode and 93 MHz or 89 MHz for the two transverse modes. In other words, one can build a generator of optical vortices and operate their spatial orientation, using triglycine sulfate.

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Section: Introductionmentioning

confidence: 99%

Tracking of optic axis with an acousto-optically diffracted beam: generation of vector-vortex beam in triglycine sulfate crystals

Krupych¹,

Kostyrko²,

Adamenko³

et al. 2020

Ukr. J. Phys. Opt.

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“…A certain exception are some recent works [28,29,30,31]. In last years, attention has been focused on crystals of lower symmetry systems, namely orthorhombic and monoclinic ones [32,33,34,35,36,37]. Acousto-optic interaction at GHz-range frequencies in anisotropic microstructures and resonators is also at the edge of applied research [38,39,40,41].…”

Section: Introductionmentioning

confidence: 99%

Extreme acoustic anisotropy in crystals visualized by diffraction tensor

Науменко¹,

Yushkov²,

Molchanov³

2019

Preprint

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Acoustic wave propagation in single crystals, metamaterials and composite structures is a basic mechanism in acoustic, acousto-electronic and acousto-optic devices. Acoustic anisotropy of crystals provides a variety of device performances and application fields, but its role in pre-estimation of achievable device characteristics and location of crystal orientations with desired properties is often underestimated. A geometrical image of acoustic anisotropy can be an important tool in design of devices based on wave propagation in single crystals or combinations of anisotropic materials. We propose a fast and robust method for survey and visualization of acoustic anisotropy based on calculation of the eigenvalues of bulk acoustic wave (BAW) diffraction tensor (curvature of the slowness surface). The stereographic projection of these eigenvalues clearly reveals singular directions of BAW propagation (acoustic axes) in anisotropic media and areas of fast or slow variation of wave velocities. The method is illustrated by application to three crystals of different symmetry used in different types of acoustic devices: paratellurite, lithium niobate, and potassium gadolinium tungstate. The specific features of acoustic anisotropy are discussed for each crystal in terms of their potential application in devices. In addition, we demonstrate that visualization of acoustic anisotropy of lithium niobate helps to find orientations supporting propagation of high-velocity surface acoustic waves.

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Wide-angle acousto-optic devices based on isotropic light scattering in biaxial crystals

Kupreychik

Balakshy

Пожар

2021

J. Phys.: Conf. Ser.

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Using the example of a rhombic crystal of alpha-iodic acid, a detailed study of new variants of acousto-optic isotropic light scattering in oblique sections of biaxial crystals, whose refractive surface contains a concave portion, is carried out. For these cases, the frequency dependences of the Bragg angles and the ranges of acousto-optic interaction are calculated. The possibility of implementing a unique, simultaneously broadband and wide-angle variant of light scattering is established. It is shown that the two-dimensional transfer function of such acousto-optic geometry has a complex X-shaped structure that has no analogues among uniaxial crystals. The possibility of applying this diffraction regime in light beam spatial filtering devices is studied.

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An Experimental Study of Ultra-Wide-Band and Ultra-Wide-Aperture Non-Collinear Acousto-Optic Diffraction in an Optically Biaxial Potassium Arsenate Titanyl Crystal

Cited by 8 publications

References 7 publications

Tracking of optic axis with an acousto-optically diffracted beam: generation of vector-vortex beam in triglycine sulfate crystals

Tracking of optic axis with an acousto-optically diffracted beam: generation of vector-vortex beam in triglycine sulfate crystals

Extreme acoustic anisotropy in crystals visualized by diffraction tensor

Wide-angle acousto-optic devices based on isotropic light scattering in biaxial crystals

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