Phys.org  March 11, 2024
Metasurfaces are candidates for vectorial optics polarization, but their static post-fabrication geometry largely limits dynamic tunability. Liquid crystal (LC) is usually employed as an additional index-changing layer together with metasurfaces. However, most of the reported LCs only impart a varying but uniform phase on top of that from the metasurface. An international team of researchers (China, Singapore) pixelated a single-layer LC to display versatile and tunable vectorial holography, in which the polarization and amplitude could be arbitrarily and independently controlled at varying spatial positions. The subtle and vectorial LC-holography highlighted the broadband and electrically switchable functionalities. According to the researchers their work reveals significant opportunities for advanced cryptography, super-resolution imaging, and many other applications… read more. Open Access TECHNICAL ARTICLE
Schematic illustrations of scalar and vectorial LC-holography… Credit: eLight volume 4, Article number: 5 (2024)Â Â Â Â