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:
Mar. 02, 2021
Filed:
Sep. 27, 2019
Kyoto University, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Hamamatsu Photonics K.k., Hamamatsu, 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 laser includes: a two-dimensional photonic crystal including a plate-shaped base member and modified refractive index regions where the modified refractive index regions have a refractive index different from that of the plate-shaped base member and are two-dimensionally and periodically arranged in the base member; an active layer provided on one side of the two-dimensional photonic crystal; and a first electrode and a second electrode provided sandwiching the two-dimensional photonic crystal and the active layer for supplying current to the active layer, where the second electrode covers a region equal to or wider than the first electrode.