Weak measurements of a large spin angular splitting of light beam on reflection at Brewster angle

TL;DR

This paper demonstrates a large spin angular splitting of light beams at the Brewster angle, combining theoretical analysis and experimental validation, and introduces a weak measurement system for exploring and controlling this effect.

Contribution

It presents the first combined theoretical and experimental study of large spin angular splitting at the Brewster angle and proposes a weak measurement method for its exploration and control.

Findings

Large spin angular splitting observed at Brewster angle

Weak measurement system effectively detects the splitting

Spin accumulation directions can be switched by polarization

Abstract

We reveal a large spin angular splitting of light beam on reflection at the Brewster angle both theoretically and experimentally. A simple weak measurements system manifesting itself for the built-in post-selection technique is proposed to explore this angular splitting. Remarkably, the directions of the spin accumulations can be switched by adjusting the initial handedness of polarization.