Ultrasonic diffraction of Bessel light beams in uniaxial gyrotropic crystals
| Autor: | G. V. Krokh, V. N. Belyi, O. V. Shakin, P. I. Ropot, G. V. Kulak |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Diffraction business.industry Physics::Optics Bragg's law Acousto-optics 02 engineering and technology Elliptical polarization 021001 nanoscience & nanotechnology Diffraction efficiency 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics symbols.namesake Optics 0103 physical sciences symbols Light beam Diffraction topography 0210 nano-technology business Bessel function |
| Zdroj: | Optics and Spectroscopy. 121:424-430 |
| ISSN: | 1562-6911 0030-400X |
| DOI: | 10.1134/s0030400x1609006x |
| Popis: | Specific features of the acousto-optic diffraction of Bessel light beams propagating in the vicinity of the optical axis of a uniaxial gyrotropic crystal have been investigated. The dependences of the diffraction efficiency on the acousto-optic interaction length, ultrasound power, and polarization state of the incident Bessel light beam have been analyzed using the coupled-wave equations and the overlap-integral method. It is shown that polarization-independent diffraction of Bessel light beams is observed in paratellurite crystals, when the Bragg diffraction efficiency is independent of the polarization state of the incident beam. The physical reason for this diffraction has been established (both theoretically and experimentally) to be simultaneous implementation of two processes of anisotropic scattering, at which the Bragg synchronism conditions are satisfied for orthogonal polarized Bessel beams with elliptical polarization. |
| Databáze: | OpenAIRE |
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