Bragg-Berry flat reflectors for transparent computer-generated holograms and waveguide holography with visible color playback capability.

ABSTRACT: Various approaches are being pursued to realize compact optical elements with the ability to manipulate light, but it is difficult to simultaneously achieve high reflectivity and the ability to see through the element. Here, we present a reflective computer-generated hologram that is completely transparent in the visible, based on the Berry (geometric) phase in a self-organizing Bragg reflector. The Bragg reflector has a helical dielectric tensor distribution with the phase information imprinted in the distribution of the optic axis on the substrate. The structure possesses only a single Fourier component and high-order reflections are suppressed; thus, the device appears completely transparent by setting the main reflection band outside the visible range for all angles of incidence access

SUBMITTER: Cho SY 

PROVIDER: S-EPMC7235227 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature