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:
Jan. 25, 2022
Filed:
Mar. 23, 2020
Massachusetts Institute of Technology, Cambridge, MA (US);
Zhuoran Fang, Guangdong, CN;
Tian Gu, Fairfax, VA (US);
Juejun Hu, Newton, MA (US);
Junying Li, Somerville, MA (US);
Yifei Zhang, Cambridge, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
An alloy of GeSbSeTeincludes atoms of Ge, Sb, Se, and Te that form a crystalline structure having a plurality of vacancies randomly distributed in the crystalline structure. The alloy can be used to construct an optical device including a first waveguide to guide a light beam and a modulation layer disposed on the first waveguide. The modulation includes the alloy of GeSbSeTewhich has a first refractive index nin an amorphous state and a second refractive index n, greater than the first refractive index by at least 1, in a crystalline state. The first waveguide and the modulation layer are configured to guide about 1% to about 50% of the light beam in the modulation layer when the alloy is in the amorphous state and guide no optical mode when the alloy is in the crystalline state.