The glass-like plate at the centre of the photograph is the angular filter. A beam of white light is incident from the right at Brewster's angle and is transmitted through the filter. The red beam of ...

Cherenkov detectors enable a valuable tool to identify high-energy particles. However, their sensitivity and momentum coverage are limited by the refractive index of host materials. Especially, ...

Angular selectivity in photonic structures refers to the controlled transmission or reflection of light based on its incidence angle. By engineering periodic dielectric arrangements, resonant cavities ...