2015/02/16 by Yeon Ui Lee, Lee, Y. U., J. W. Wu +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magneto-Optical Properties and Applications #Optics (physics.optics) #Orbital Angular Momentum in Optics #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.1502.04546
openalex publication_date 2015/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Optical spin Hall (OSH) shift has been observed by weak measurement amplification in a refraction beam passing through air-glass interface, the refractive index gradient ∇ n being normal to the interface. Phase-discontinuity metasurface (PMS) possesses ∇ n tangential to the metasurface, and depending on the incidence angle either positive or negative refraction takes place satisfying the generalized Snell's law. Rapid phase-change over subwavelength distance at PMS leads to a large ∇ n, enabling a direct observation of OSH shift. Here, we identify that the relative OSH shift between optical beams with spins ± 1 depends on incidence and refraction angles at PMS, and construct a measurement of OSH effect with a variable phase retardance in the post-selection to demonstrate a control of transverse shift. and demonstrate a control of OSH shift by constructing a weak value measurement with a variable phase retardance in the post-selection. Capability of OSH shift control permits a tunable precision metrology applicable to nanoscale photonics such as angular momentum transfer and sensing.