Polarization-independent 3D metasurface with complex amplitude modulation

• DOI: 10.1364/oe.470718
• Publication Date: 2022-09-16T11:00:14Z
• Authors: Yuncheng Liu; Hui Gao; Xuhao Fan; Xinger Wang; Ke Xu; Binzhang Jiao; Minghui Hong; Wei Xiong
• Keywords: 0103 physical sciences; 01 natural sciences

Metasurfaces, which possess unprecedented capabilities in manipulating electromagnetic wavefronts, are promising for accurate complex amplitude modulation with a compact device. However, current strategy of complex amplitude modulation based on metasurfaces focuses on anisotropic unit design which is intrinsically constrained of polarization states. In this study, we propose a design methodology of polarization-independent metasurface which comprises an array of nanocylinders with various radii and heights. The effectiveness of the proposed scheme is verified using an optical vortex generator and a complex-amplitude hologram device. The straightforward, cost-effective, and polarization-independent design can provide robust and reliable solutions for wavefronts modulation in various optical applications.