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Wideband optical modulation via the magneto–optic interaction in a bismuth-lutetium-iron garnet film
, D. Stancil D.
Published in AIP Publishing
1997
Volume: 71
   
Issue: 2
Pages: 151 - 153
Abstract

Optical modulation with a bandwidth of about 3 GHz centered at 5.75 GHz was observed in a thin film of [BiLu]3Fe5O12[BiLu]3Fe5O12 using the magneto-optical interaction. A microstrip transducer was placed in contact with the film and TM polarized optical guided modes were excited beneath and parallel to the transducer. The TMTE mode conversion was measured as a function of the angle between an in-plane field, of up to 100 Oe, and the optical beam. The bandwidth of the modulation was limited by the microwave components used in the external circuit. The experiments qualitatively agree with a simple model that describes a modulation of the optical beam by a nonresonant precession of the magnetization about an equilibrium.

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Open AccessNo