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. 19, 2026
Filed:
Dec. 02, 2021
Tohoku University, Sendai, JP;
Chuo University, Tokyo, JP;
Shinichiro Iwai, Sendai, JP;
Yohei Kawakami, Sendai, JP;
Tatsuya Amano, Sendai, JP;
Kenya Ohgushi, Sendai, JP;
Kenji Yonemitsu, Tokyo, JP;
TOHOKU UNIVERSITY, Sendai, JP;
CHUO UNIVERSITY, Tokyo, JP;
Abstract
An object of the present invention is to provide an optical switch element, an optical switch device, an optical communication system, and an optical computer capable of operating even in a temperature range higher than the Néel temperature. An optical switch element () according to the present invention includes a substance including a plurality of transition metal elements having electrons in d-orbitals, and a plurality of anions arranged around each of the plurality of transition metal elements, in which the plurality of transition metal elements are arranged in a lattice form, t-orbitals into which the d-orbitals of each of the plurality of transition metal elements are split are connected annularly, and in a state in which the substance does not have a long-range magnetic order, the polarization of signal light (L) is rotated when control light (C) is applied.