A new publication from Opto-Electronic Advances; DOI 10.29026/oea.2026.250149, discusses a quarter-wave geometric-phase ...
The phase and the group velocity of light propagating in conventional optical media cannot exceed the speed of light in vacuum. However, in so-called epsilon-near-zero (ENZ) materials, light exhibits ...
A diffractive complex field imager simultaneously captures the amplitude and phase distributions of unknown input complex objects across two spatially separated fields of view at the output plane.