Light Diffraction and Polarization Effects in Isotropic Media with Acoustically Induced Anisotropy
A theoretical model for the description of the optical diffraction phenomenon in an isotropic medium with ultrasonically induced anisotropy is presented. It is shown how to calculate the intensities and the state of light polarization in a specific order of diffraction, and numerical computations are performed in the case of fused silica. The polarization effects are discussed for Raman-Nath and Bragg type diffraction, and for diffraction under intermediate conditions, the main interest being on the latter case. It is seen that especially in the intermediate diffraction regime the polarization properties of the diffracted light show a very wide diversity. Although the state of polarization in a particular order of diffraction is mainly elliptical, linear and circular polarization may occur at suitable combinations of the sound frequency and amplitude, especially in the zero order. The possibility to create Bragg effects at higher order Bragg angles is demonstrated as well, and the accompanying polarization properties are discussed.
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Document Type: Research Article
Publication date: May 1, 1996
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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