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:
Nov. 13, 2018
Filed:
Dec. 21, 2017
Sumitomo Electric Industries, Ltd., Osaka, JP;
Sundararajan Balasekaran, Yokohama, JP;
Hiroshi Inada, Yokohama, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An optical switch includes a first optical absorbing layer sensitive to a first light and having a first superlattice structure and a first bandgap; a second optical absorbing layer sensitive to a second light and having a second bandgap smaller than that of the first bandgap; and a barrier layer having a second superlattice structure. The first optical absorbing layer, the second optical absorbing layer, and the barrier layer are arranged in a direction of an axis to form an arrangement with a first band-offset in a conduction band of the first optical absorbing layer, a second band-offset in a conduction band of the barrier layer, and a well in a conduction band of the second optical absorbing layer.