Circularly-polarized, semitransparent and double-sided holograms based on helical photonic structures.

ABSTRACT: Recent advances in nanofabrication techniques are opening new frontiers in holographic devices, with the capability to integrate various optical functions in a single device. However, while most efficient holograms are achieved in reflection-mode configurations, they are in general opaque because of the reflective substrate that must be used, and therefore, have limited applicability. Here, we present a semi-transparent, reflective computer-generated hologram that is circularly-polarization dependent, and reconstructs different wavefronts when viewed from different sides. The integrated functionality is realized using a single thin-film of liquid crystal with a self-organized helical structure that Bragg reflects circularly-polarized light over a certain band of wavelengths. Asymmetry depe

SUBMITTER: Kobashi J 

PROVIDER: S-EPMC5705659 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature