Abstract
We demonstrate a novel spatial light phase modulator composed of a one-dimensional magnetophotonic crystal driven by a piezoelectric film. With the application of a constant magnetic bias field perpendicular to the film plane, the magneto-optic Kerr rotation angle of the modulator was subject to continuous change from 3.8–2.4° with the voltage up to 50 V and hence a continuous phase modulation for rays with circular polarization. Surprisingly, the magneto-optical response of the modulator showed nonvolatile behavior and the light phase was maintained at a designated value without applying any stress. Based upon the above experimental results, magneto-optic spatial light phase modulators with a 64 × 64 array of magnetic pixels were constructed. The fabricated device had a dimension of 15 μm2 and demonstrated two-dimensional optical modulation of the phase of reflected rays.
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