Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1998-05-29
2000-09-26
Epps, Georgia
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359321, 359322, 257 21, 257 40, G02F 103, H01L 3524
Patent
active
061249645
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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Hamada Tomoyuki
Imanishi Yasuo
Ishihara Shingo
Epps Georgia
Hitachi , Ltd.
Lester Evelyn A.
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