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:
Aug. 24, 2010
Filed:
Mar. 07, 2006
Susumu Noda, Kyoto, JP;
Takashi Asano, Kyoto, JP;
Yoshinori Tanaka, Kyoto, JP;
Seiichi Takayama, Tokyo, JP;
Susumu Noda, Kyoto, JP;
Takashi Asano, Kyoto, JP;
Yoshinori Tanaka, Kyoto, JP;
Seiichi Takayama, Tokyo, JP;
Kyoto University, Kyoto, JP;
TDK Corporation, Tokyo, JP;
Abstract
The present invention provides a polarized light mode converter which can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal. In a two-dimensional photonic crystal made of a slab-like main body provided with a plurality of different refractive index regions (for example, holes) arranged in a lattice in the main body, where the different refractive index regions have a refractive index different from that of the main body, a polarized light conversion waveguideis formed which is comprised of defects of the different refractive index regions arranged linearly whose a cross-sectional shape is asymmetrical in a vertical and in a horizontal direction. The polarized light conversion waveguidecan be, for example, realized by providing, on a side of the waveguide, holesandextending in a direction oblique to a the main body surface. TE polarized light propagating through the polarized light conversion waveguideis partially converted into TM polarized light due to the asymmetry of the cross-sectional shape of the waveguide. Since the polarized light mode converter is made of a two-dimensional photonic crystal, it can be provided within a two-dimensional photonic crystal or can be smoothly connected to a two-dimensional photonic crystal.