Magnetically actuated dynamic polarizer and polarization retainer using a Ce:YIG-based multilayered structure at a...

The presented proposal focuses on a magneto-optically engineered multilayered structure enabling polarization conservation and magnetic-field-induced tunability of reflected light at 1550 nm. A ZnSe prism, a synthesized SiN_x dielectric, and a Ce:YIG magneto-optic layer form the design, optimized to support total internal reflection with conserved polarization at 67.53°. By applying 0-360 mT magnetic fields, the structure facilitates dynamic modulation of reflected light's phase angle, amplitude ratio, orientation angle, ellipticity, and handedness. Achieving full 2π phase angle tunability, linear to elliptical to circular polarization transitions, and rotation angles up to 135°, this work demonstrates superior polarization control, offering significant potential for tunable photonic and beam-steering applications.