Directionally Asymmetric Janus Metasurface Hologram

Yu-Chuan Chang^1*, Chang-Yi Lin¹, Yao-Wei Huang¹

¹Photonics, National Yang Ming Chiao Tung University, Hsinchu, Taiwan

* Presenter:Yu-Chuan Chang, email:chuan0212.ee12@nycu.edu.tw

Janus metasurface is an interesting device capable of being applied in direction-dependent functionalities and has been widely utilized for a wealth of uses in the optical fields. Nonetheless, most of them encounter spatial multiplexing and efficiency losses from metal in the visible spectrum. As a result, we design a single-layer TiO2-based Janus metasurface hologram at a wavelength of 532 nm according to Jones matrix derivation we developed to generate the desired images with light incident in opposite directions, successfully fabricating the sample for the elliptical polarization state. In addition, we present the simulated holographic images and measured results to compare the difference between them, which confirms the great potential of our Janus metasurface and provides an opportunity to extend its utility across the diverse domains in the future.

Keywords: Janus metasurface, direction-dependent, hologram