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. 27, 1980
Filed:
Jun. 09, 1978
Applicant:
Inventors:
Leo Esaki, Chappaqua, NY (US);
George A Sai-Halasz, Mohegan Lake, NY (US);
Leroy L Chang, Lake Mohegan, NY (US);
Assignee:
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 30 ; 357 16 ; 357-4 ; 357-3 ;
Abstract
An optical device is disclosed which includes first and second superlattice emiconductor regions. The first superlattice semiconductor region includes a plurality of alternating barrier and light absorbing layers which absorbs light of a first light frequency. The second superlattice region also includes a plurality of alternating barrier and light absorbing layers. However, the light absorbing layers of the second superlattice semiconductor region absorbs light of a different frequency.