Electrically tunable intensity of metaholography using liquid-crystal assisted chiral metasurfaces at the visible

Younghwan Yang; Hongyoon Kim; Junsuk Rho

doi:10.1117/12.2632939

3 October 2022 Electrically tunable intensity of metaholography using liquid-crystal assisted chiral metasurfaces at the visible

Younghwan Yang, Hongyoon Kim, Junsuk Rho

Author Affiliations +

Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121950K (2022) https://doi.org/10.1117/12.2632939
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

Tunable metasurfaces have been steadily investigated to miniaturize optical devices by altering active module that is equipped with mechanical actuators. However, almost all of recent tunable metasurfaces focused on switching functionality between two distinct states or more. Here, we proposed spin-selective metasurfaces, which perfectly absorb certain circularly polarized light, while reflecting counter circularly polarized light with desired phases. The metasurfaces consist of split ring resonators on metal-dielectric metal structures to enlarge their plasmonic responses, approaching near-zero reflection of LCP, and 14% reflection of RCP at the wavelength of 635 nm. With the metasurface, we implanted it on electrically tunable liquid crystals for intensity tuning of encoded holograms. 23-steps of hologram intensities are experimentally demonstrated with liquid crystal integrated split ring resonators. Considering that previous spin-selective metasurfaces are designed with a complex fabrication process, our liquid crystal integrated split ring resonators will be a dominant option for altering active and bulky optical components.

Conference Presentation

Citation Download Citation

Younghwan Yang, Hongyoon Kim, and Junsuk Rho "Electrically tunable intensity of metaholography using liquid-crystal assisted chiral metasurfaces at the visible", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121950K (3 October 2022); https://doi.org/10.1117/12.2632939

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KEYWORDS

Liquid crystals

Dichroic materials

Plasmonics

Polarization

Split ring resonators

Amorphous silicon

Germanium

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