The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2009
Filed:
Aug. 21, 2007
Osamu Mitomi, Nagoya, JP;
Yuichi Iwata, Nagoya, JP;
Jungo Kondo, Nishikamo-Gun, JP;
Kenji Aoki, Ichinomiya, JP;
Tetsuya Ejiri, Kasugai, JP;
Osamu Mitomi, Nagoya, JP;
Yuichi Iwata, Nagoya, JP;
Jungo Kondo, Nishikamo-Gun, JP;
Kenji Aoki, Ichinomiya, JP;
Tetsuya Ejiri, Kasugai, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
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 columnsA,B andC of at least first, second and third orders in distance with respect to said waveguide portion.