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. 21, 2019
Filed:
Jan. 30, 2018
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sundararajan Balasekaran, Yokohama, JP;
Kohei Miura, Yokohama, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An optical switching device includes: an optical absorbing layer having a first superlattice structure and responding to an incident light; an excitation layer having a second superlattice structure and producing an electron by thermal excitation; and a barrier layer having a third superlattice structure, the optical absorbing layer and the barrier layer enabling a first band offset and a second band offset to form a well in a conduction band of the second superlattice structure of the excitation layer with reference to a conduction band of the first superlattice structure of the optical absorbing layer and a conduction band of the third superlattice structure of the barrier layer, respectively.