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. 30, 2014
Filed:
Mar. 30, 2007
Susumu Noda, Uji, JP;
Yoshitaka Kurosaka, Kyoto, JP;
Eiji Miyai, Kyoto, JP;
Dai Ohnishi, Kyoto, JP;
Wataru Kunishi, Kyoto, JP;
Susumu Noda, Uji, JP;
Yoshitaka Kurosaka, Kyoto, JP;
Eiji Miyai, Kyoto, JP;
Dai Ohnishi, Kyoto, JP;
Wataru Kunishi, Kyoto, JP;
Kyoto University, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A two-dimensional photonic crystal surface emitting laser light source includes a two-dimensional photonic crystal made of a plate-shaped body material provided with a periodic arrangement of identically-shaped holes and an active layer. The hole is not located on a first half-line extending from the gravity center of the hole, while the hole is located on a second half-line extending in the direction opposite to the first half-line. Injecting electric charges into the active layer generates light, which creates an electric field encircling the gravity center. For a given point on the second half-line where the hole is located, there is no hole at a point that is symmetrical to the aforementioned point with respect to the gravity center, so that the electric field vectors at the two points do not cancel each other and the laser light is stronger than conventional examples.