US Patent 7532777 Optical functional devices
Patent 7532777 was granted and assigned to NGK Insulators on May, 2009 by the United States Patent and Trademark Office.
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An optical functional device has a slab type two-dimensional photonic crystal layer. The photonic crystal layer has a dielectric layer and a plurality of lattice columns each comprising dielectric pillars. A waveguide portion is provided in the photonic crystal layer. A ground electrode and a signal electrode are formed on the dielectric layer for applying a modulating voltage on light propagating in the waveguide portion. A layer of a high dielectric constant is laminated on the dielectric layer. A low dielectric portion is formed direct under the waveguide portion and the lattice columns 7A, 7B and 7C of at least first, second and third orders in distance with respect to said waveguide portion.
US Patent 07532777 Optical functional devices US Patent 7532777 Optical functional devices
US Patent 07532777 Optical functional devices
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