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:
May. 08, 2012
Filed:
Aug. 11, 2004
Applicants:
Tadashi Itoh, Toyonaka, JP;
Masaaki Ashida, Ibaraki, JP;
Inventors:
Tadashi Itoh, Toyonaka, JP;
Masaaki Ashida, Ibaraki, JP;
Assignee:
Japan Science and Technology Agency, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 3/09 (2006.01);
U.S. Cl.
CPC ...
Abstract
A laser device which causes lasing with a use of a semiconductor quantum dot is provided with: a laser member () in which the semiconductor quantum dot is formed; a resonator () for resonating light generated in the laser member (); and a pump laser () for irradiating the laser member () with excitation light whose energy corresponds to two-photon resonant excitation, so as to form a biexciton state in the semiconductor quantum dot by the two-photon resonant excitation. In this way, a laser device which enables lasing using efficient light emission is realized.