title: Acousto-optic interaction in a non-homogeneous acoustic field excited by a wedge-shaped transducer.
abstract: The article is devoted to theoretical analysis of light diffraction in a non-homogeneous acoustic field created by a wedge-shaped piezoelectric transducer. Relationships describing electrical, acoustic and acousto-optic properties of the acousto-optic cell are derived in the approximation of a small thickness of the piezoelectric plate. Principal characteristics of acousto-optic interaction are examined such as dependences of the light diffraction efficiency on the phase mismatch and the acoustic wave amplitude. It is shown that the acoustic field has a complicated amplitude-phase structure changing with the acoustic frequency. It is demonstrated that the diffraction efficiency in the Bragg regime can approach 100% in spite of a noticeable phase mismatch. The appropriate optimal values of ultrasound power and incidence angles of light are found.
authors.affiliation: Moscow State University, Department of Physics, Vorobyevy Gory 1, 119991 Moscow, Russia. balakshy@phys.msu.ru
authors.forename: Vladimir I
authors.initials: VI
authors.lastname: Balakshy
authors.forename: Bogumil B J
authors.initials: BB
authors.lastname: Linde
authors.forename: Anna N
authors.initials: AN
authors.lastname: Vostrikova
mesh_terms: D000162:Acoustics / Q000295:instrumentation*; D003198:Computer Simulation; D017076:Computer-Aided Design; D054459:Elasticity Imaging Techniques / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008027:Light; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D012542:Scattering, Radiation; D014159:Transducers