US 12,487,477 B2
Magnetization-free Faraday rotators
Andrey Chabanov, Austin, TX (US); Carl Pfeiffer, Austin, TX (US); Igor Anisimov, Austin, TX (US); and Ilya Vitebskiy, Austin, TX (US)
Assigned to Board of Regents, The University of Texas System, Austin, TX (US)
Filed by Board of Regents, The University of Texas System, Austin, TX (US)
Filed on Oct. 24, 2022, as Appl. No. 17/971,949.
Claims priority of provisional application 63/262,896, filed on Oct. 22, 2021.
Prior Publication US 2023/0131058 A1, Apr. 27, 2023
Int. Cl. G02F 1/09 (2006.01)
CPC G02F 1/093 (2013.01) 21 Claims
OG exemplary drawing
 
1. A system comprising:
a Faraday rotator device comprising a magneto-optical composite material having first and second magnetic component materials in a periodic or uniform pattern in an X-Y plane,
wherein the first and second magnetic component materials are magnetized along a Z-axis in opposite directions,
wherein the Faraday rotator device produces nonzero magnetic Faraday rotation for an electromagnetic wave propagating in a Z-axis direction in the absence of an external bias magnetic field.