Light Modulator on the Basis of Magneto-Optical Crystal in a Bimorphic Structure Operating in the Magneto-Mechanical Vibration Mode
A model of light modulator based on a bimorphic element consisting of a magneto-optical crystal layer on a magnetically passive substrate has been proposed. An equation describing magneto-mechanical vibrations in a rectangular bimorphic element with asymmetric thickness is derived, and an algorithm of its solution in the case of a specimen with free edges is proposed. The modulator is shown to be characterized by a two-dimensional distribution function for the rotation angle of the polarization plane in a light-beam cross-section. Calculations for bismuth-substituted yttrium ferrite garnet on a gadolinium-gallium substrate showed that the rotation angle of the light-beam polarization plane owing to the Faraday effect can reach 3∘ for the fundamental mode of bimorphic element vibrations.
I.V. Linchevskyi and O.N. Petrischev, Ukr. Fiz. Zh. 56, 496 (2011).
I.V. Linchevskyi, T.I. Shevchenko, and V.D. Tron'ko, Opt. Spektrosk. 114, 124 (2013).
I.V. Linchevskyi, Opt. Spektrosk. 115, 785 (2013)
I.V. Linchevskyi, Radiofiz. Elektron. 2, 43 (2014).
J.G. Smits, S I. Dalke, and T.K. Cooney, Sensors Actuat. A 28, 41 (1991).
V. Sharapov, M. Musienko, and E. Sharapova, Piezoelectric Sensors (Tekhnosfera, Moscow, 2006) (in Russian).
F. Sammjura, K. Smyth, and S.-G. Kim, Ultrasonics 53, 328 (2013).
J.K. Lee and M.A. Marcus, Ferroelectrics 32, 93 (1981).
L.H. Donnell, Beams, Plates, and Shells (McGraw-Hill, New York, 1976).
R.M. Bozorth, Ferromagnetism (Van Nostrand, New York, 1959).
P. Hansen and J.-P. Krumme, Thin Solid Films 114, 69 (1984).