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Abstract

In an organic/inorganic composite superlattice type optical modulator capable of entering/projecting light, and capable of modulating an optical characteristic such as transmittance, reflectivity, and a refractive index of light in response to an externally controlled electric field, or light, the organic/inorganic composite superlattice type optical modulator includes at least one type of a compound semiconductor layer and at least one type of an organic compound layer; the compound semiconductor layer and the organic compound layer are alternately stacked in greater than one period; at least one of the compound semiconductor layer and the organic compound layer being crystalline; and also a thickness of each of the layers is made larger than a Bohr radius of the compound semiconductor and smaller than 10 times the Bohr radius. As a result, this novel optical modulator can provide a high nonlinear characteristic by a semiconductor modulator, and a high response characteristic by an organic modulator.

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First Claim