Photonic spin Hall effect in hyperbolic metamaterials at visible

Abstract

Photonic spin Hall effect in transmission is a transverse beam shift of the out-coming beam depending on polarization of the in-coming beam. The effect can be significantly enhanced by materials with high anisotropy. We report the first experimental demonstration of the photonic spin Hall effect in a multilayer hyperbolic metamaterial at visible wavelengths (wavelengths of 520 nm and 633 nm). The metamaterial is composed of alternating layers of gold and alumina with deeply-subwavelength thicknesses, exhibiting extremely large anisotropy. The angle resolved polarimetric measurements showed the shift of 165 $\mu m$ for the metamaterial of 176 nm in thickness. Additionally the transverse beam shift is extremely sensitive to the variations of the incident angle changing theoretically by 270 $\mu m$ with one milli-radian ($0.057^{\circ }$). These features can lead to minituarized spin Hall switches and filters with high angular resolution.

4 pages, 4 figures

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• Spin-Hall effect of light at a tilted polarizer
• Wide-angle giant photonic spin Hall effect
• On anomalous optical beam shifts at near-normal incidence
• Magnetically induced topological transitions of hyperbolic dispersion in biaxial gyrotropic media
• Spin-Orbit Interactions of Light: Fundamentals and Emergent Applications
• High-Dimensional Entanglement of Photonic Angular Qudits
• Resonant Spin Hall Effect of Light in Random Photonic Arrays
• Spin Hall effect of light under arbitrarily polarized and unpolarized light