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. 10, 2005
Filed:
Apr. 19, 2002
Alfred Yi Cho, Summit, NJ (US);
Claire F. Gmachl, New Providence, NJ (US);
Hock Min NG, Mountainside, NJ (US);
Alfred Yi Cho, Summit, NJ (US);
Claire F. Gmachl, New Providence, NJ (US);
Hock Min Ng, Mountainside, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A quantum well structure is provided that includes two or more quantum well layers coupled by at least one barrier layer such that at least one of a piezo-electric field and a pyro-electric field is produced. The quantum well structure is sufficiently doped to cause a Fermi energy to be located between ground states and excited states of the coupled quantum well layers. The quantum well structure can be incorporated into a layered semiconductor to form optical devices such as a laser or optical amplifier.