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:
Oct. 29, 2019
Filed:
Aug. 28, 2015
Kyoto University, Kyoto-shi, Kyoto, JP;
Rohm Co., Ltd., Kyoto-shi, Kyoto, JP;
Hamamatsu Photonics K.k., Hamamatsu-shi, Shizuoka, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Susumu Noda, Kyoto, JP;
Hitoshi Kitagawa, Kyoto, JP;
Yong Liang, Zurich, CH;
Akiyoshi Watanabe, Hamamatsu, JP;
Kazuyoshi Hirose, Hamamatsu, JP;
KYOTO UNIVERSITY, Kyoto, JP;
ROHM CO., LTD., Kyoto, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
To provide a two-dimensional photonic crystal surface emitting laser capable of improving characteristics of light to be emitted, in particular, optical output power. The two-dimensional photonic crystal surface emitting laserX includes: a two-dimensional photonic crystalincluding a plate-shaped base memberand modified refractive index regionswhere the modified refractive index regionshave a refractive index different from that of the plate-shaped base memberand are two-dimensionally and periodically arranged in the base member; an active layerprovided on one side of the two-dimensional photonic crystal; and a first electrodeA and a second electrodeprovided sandwiching the two-dimensional photonic crystaland the active layerfor supplying current to the active layer, where the second electrodecovers a region equal to or wider than the first electrodeA, wherein the first electrodeA is formed so as to supply the current to the active layerwith a different density depending on the in-plane position on the first electrodeA.