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:
Dec. 14, 2010
Filed:
Mar. 04, 2005
Susumu Noda, Kyoto, JP;
Takashi Asano, Kyoto, JP;
Seiichi Takayama, Chuo-ku, JP;
Hitoshi Kitagawa, Ota-ku, JP;
Susumu Noda, Kyoto, JP;
Takashi Asano, Kyoto, JP;
Seiichi Takayama, Chuo-ku, JP;
Hitoshi Kitagawa, Ota-ku, JP;
Abstract
The present invention provides a two-dimensional photonic crystal in which an absolute photonic band gap (PBG), i.e. a photonic band gap that is effective for both the TE-polarized light and the TM-polarized light within a predetermined wavelength range, is created with an adequate bandwidth. The bodyis provided with holesarranged in a triangular lattice pattern, where the basic shape of the hole is an equilateral triangle. This shaping and arranging of the holes creates an absolute PBG. Each corner of the equilateral triangle is cut along an arc to leave an adequate distance between the neighboring holes (i.e. an adequate width of the connecting portion of the body). This design makes it possible to enlarge each holewhile ensuring an adequate strength of the two-dimensional photonic crystal. This construction creates an absolute PBG having a large width.