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:
Sep. 06, 2011
Filed:
Feb. 27, 2009
C. Kumar N. Patel, Los Angeles, CA (US);
Alexei Tsekoun, Los Angeles, CA (US);
Richard Maulini, Los Angeles, CA (US);
Arkadiy Lyakh, Los Angeles, CA (US);
Christian Pflugl, Cambridge, MA (US);
Laurent Diehl, Cambridge, MA (US);
Qijie Wang, Cambridge, MA (US);
Federico Capasso, Cambridge, MA (US);
C. Kumar N. Patel, Los Angeles, CA (US);
Alexei Tsekoun, Los Angeles, CA (US);
Richard Maulini, Los Angeles, CA (US);
Arkadiy Lyakh, Los Angeles, CA (US);
Christian Pflugl, Cambridge, MA (US);
Laurent Diehl, Cambridge, MA (US);
Qijie Wang, Cambridge, MA (US);
Federico Capasso, Cambridge, MA (US);
President and Fellows of Harvard College, Cambridge, MA (US);
Abstract
A quantum cascade laser utilizing non-resonant extraction design having a multilayered semiconductor with a single type of carrier; at least two final levels (and) for a transition down from level; an energy spacing Egreater than E; an energy spacing Eof about 100 meV; and an energy spacing Eabout equal to E. The carrier wave function for leveloverlaps with the carrier wave function for level. Likewise, the carrier wave function for level' overlaps with the carrier wave function for level. In a second version, the basic design also has an energy spacing Eof about 90 meV, and levelsand′ do not have to be spatially close to each other, provided that levelhas significant overlap with both these levels. In a third version, there are at least three final levels (, and) for a transition down from level. Each of the levels, andhas a non-uniform squared wave function distribution.