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:
Sep. 25, 2007
Filed:
Oct. 23, 2006
Kazuya Nobayashi, Kawasaki, JP;
Akinari Takagi, Yokosuka, JP;
Hikaru Hoshi, Yokohama, JP;
Kiyokatsu Ikemoto, Yokohama, JP;
Kazuya Nobayashi, Kawasaki, JP;
Akinari Takagi, Yokosuka, JP;
Hikaru Hoshi, Yokohama, JP;
Kiyokatsu Ikemoto, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A three-dimensional photonic crystal of the present invention has a complete photonic band gap in a wide wavelength region and that can be easily produced. A three-dimensional photonic crystal in which a plurality of layers including a periodic-refractive-index structure are periodically stacked includes, a first layer having holes provided at lattice points of a first rectangular lattice and a second rectangular lattice, a second layer having columnar structures at lattice points of a face-centered rectangular lattice, a third layer having a periodic structure the same as that of the first layer and disposed at a shifted position, and a fourth layer having a periodic structure the same as that of the second layer.