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:
Jul. 06, 2004
Filed:
Mar. 12, 2002
Applicant:
Inventors:
Federico Capasso, Westfield, NJ (US);
Alfred Yi Cho, Summit, NJ (US);
Rafaelle Colombelli, Hoboken, NJ (US);
Claire F. Gmachl, New Providence, NJ (US);
Trinesha Shenika Mosely, Gibson, LA (US);
Axel Straub, Kingsford, AU;
Deborah Lee Sivco, Warren, NJ (US);
Mariano Troccoli, Chatham, NJ (US);
Assignee:
Lucent Technologies Inc., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/32 ;
U.S. Cl.
CPC ...
H01S 5/32 ;
Abstract
In an intersubband light emitter, at least two injection/relaxation (I/R) regions contiguous with the same RT region have different doping levels. Preferably, one I/R region has a doping level that is at least 100 times lower than that of the other I/R region. In one embodiment, one I/R region is undoped, whereas the other I/R region is doped.