Multifunctional and Reconfigurable Electromagnetic and Acoustic Metasurfaces

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About this Research Topic

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Background

Metasurfaces are 2D equivalent of metamaterials which are used for wave control at subwavelength scales. Since their invention, numerous possibilities have been realized with small footprint and high efficiency. Recently, multifunctional, reconfigurable and tunable metasurfaces have emerged as an active research field that addresses the limitation of conventional metasurfaces. Such metasurfaces can handle concurrent multi-tasks with a single device, providing more degrees of freedom in controlling the electromagnetic/acoustic waves to meet the increasing demands of data-storage capacity and information processing speed. These devices are often engineered to enable multiple functionalities or can be reconfigured to display different characteristics. So far, a wide range of applications have been proposed and realized, such as polarization-selective device, multi-band metasurfaces, tunable absorbers, and reconfigurable imagers, which show improved capacities in wave manipulation.

Many multiplexing methods and active components have been explored for versatile control of electromagnetic and acoustic waves with integrated functionality and reconfigurability. Future development of this field calls for further investigation of the current methods/materials and exploration of new mechanism. It is also important to find avenues to apply these metasurfaces to broaden their potential applications.

This collection of articles aims to gather recent developments of multifunctional and reconfigurable electromagnetic/acoustic metasurfaces, and the resulted novel wave control techniques and real-world applications to further advance this vibrant field.

Topics addressed in this Research Topic may include, but are not limited to:
· Overview or perspective of this emerging field
· New approaches and components/structures to control electromagnetic, acoustic, or elastic waves
· Design and realization of metasurfaces with different functions
· Practical applications of multifunctional and reconfigurable metasurfaces
· Tunable, reconfigurable, and programmable metasurface design with emphasis on the tuning mechanism, efficiency, and actual implementation
· Physics on wave-matter interactions in metasurfaces

Keywords: metasurface, multifunctional, tunable, reconfigurable, wavefront, electromagnetic, acoustic

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