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:
Jun. 30, 2020
Filed:
Jun. 03, 2019
International Business Machines Corporation, Armonk, NY (US);
Herwig Hahn, Adliswil, CH;
Charles Caër, Adliswil, CH;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A device may include a substrate and an active region. This active region may include a stack of semiconductor gain materials stacked along a stacking direction. The latter may extend substantially perpendicular to a plane of the substrate. The active region may be furthermore tapered so as to widen toward the substrate. In addition, the device may include a pair of doped layers semiconductor materials, the pair may include an n-doped layer and a p-doped layer arranged on the substrate and on opposite. The doped layers may be arranged on the substrate and on opposite, lateral sides of the tapered active region, respectively. The device may include an electron blocking layer, which may extend both at a first interface, between a p-doped layer and the substrate, and at a second interface, between the tapered active region and the p-doped layer, along a lateral side of the tapered active region.