Fig. 2
Vectorial LC-holographic clock. a LC-based vectorial holographic clock for time information encryption. b Target holographic images for incident light with RCP, LCP, and LP. The corresponding vectorial information is denoted. c Simulated phase difference distribution between the holographic images of LCP and RCP. d POM texture of the holographic LC superstructure. The white arrows represent the crossed polarizer and analyzer. Scale bar: 50 μm. e Vectorial LC-holographic images at various input/output polarization channels. The blue and red arrows indicate the input and output light polarization, respectively. The measured Stokes parameter values S1, S2, S3 of four typical regions in the LC-holographic clock image (marked by green, yellow, orange, and blue dots) are presented at the bottom