Abstract

Metasurfaces can manipulate light in desired ways by accurate design of the geometrical parameters and arrangement of two-dimensional meta-atoms. Each pixel can be individually tuned to control spatially the amplitude, phase, and polarization of reflected or transmitted light [1]. Holographic metasurfaces are practical tools to achieve functional multiplexing since different images can be encoded in a single metasurface using different properties of the light, such as wavelength, angular momentum, amplitude, and polarization [2]. These images can also be reconstructed or switchable depending on mechanical stretching, applying different voltage, incident angle, chemical reaction, and surrounding medium [3]. The advantage of multiplexing and tunability makes holographic metasurface an excellent candidate for application in encryption, display and sensing [4].

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