Photonic spin Hall effect in hyperbolic metamaterials at visible wavelengths

OSAMU TAKAYAMA; JOHNEPH SUKHAM; RADU MALUREANU; ANDREI V. LAVRINENKO; GRACIANA PUENTES

OPTICS LETTERS

OPTICAL SOC AMER

Lugar: Washington; Año: 2018 vol. 43 p. 4602 - 4605

0146-9592

The photonic spin Hall effect in transmission is a transversebeam shift of the out-coming beam depending on polarizationof the incoming beam. The effect can be significantlyenhanced by materials with high anisotropy. We report, tothe best of our knowledge, the first experimental demonstrationof the photonic spin Hall effect in a multilayer hyperbolicmetamaterial at visible wavelengths (wavelengthsof 520 and 633 nm). The metamaterial is composed ofalternating layers of gold and alumina with deeply subwavelengththicknesses, exhibiting extremely large anisotropy.The angle-resolved polarimetric measurements showedthe shift of 165 μm for the metamaterial of 176 nm in thickness.Additionally, the transverse beam shift is extremelysensitive to the variations of the incident angle changingtheoretically by 270 μm with 1 milli-radian (0.057°). Thesefeatures can lead to minituarized spin Hall switches and filterswith high angular resolution