Multifunctional Metasurfaces - Sun, Shulin

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Résumé :
In recent years, we have witnessed a rapid expansion of using super-thin metasurfaces to manipulate light or electromagnetic wave in a subwavelength scale. However, most designs are confined to a passive scheme and monofunctional operation, which hinders considerably the promising applications of the metasurfaces. Specifically, the tunable and multifunctional metasurfaces enable to facilitate switchable functionalities and multiple functionalities which are extremely essential and useful for integrated optics and microwaves, well alleviating aforementioned issues. In this book, we introduce our efforts in exploring the physics principles, design approaches, and numerical and experimental demonstrations on the fascinating functionalities realized. We start by introducing in Chapter 2 the merging scheme in constructing multi-functional metadevices, paying particular attention to its shortcomings issues. Having understood the merits and disadvantages of the merging scheme, we then introduce in Chapter 3 another approach to realize bifunctional metadevices under linearly polarized excitations, working in both reflection and transmission geometries or even in the full space. As a step further, we summarizes our efforts in Chapter 4 on making multifunctional devices under circularly polarized excitations, again including designing principles and devices fabrications/characterizations. Starting from Chapter 5, we turn to introduce our efforts on using the active scheme to construct multifunctional metadevices under linearly polarized wave operation. Chapter 6 further concentrates on how to employ the tunable strategy to achieve helicity/frequency controls of the circularly polarized waves in reflection geometry. We finally conclude this book in Chapter 7 by presenting our perspectives on future directions of metasurfaces and metadevices.

Biographie:
He-Xiu Xu received his Ph.D. in Electronic Science and Technology from the Air Force En gineering University, China, in 2014. From 2015-2017, he was a postdoctoral fellow of the Physics Department at Fudan University (Shanghai, China). In 2017-2018, he was a visiting scholar in the Department of Electrical and Computer Engineering of the National University of Singapore. He joined the Department of Electronic Science and Technology of Air Force Engineering University in 2014 as an assistant professor, became an associate professor in 2016, and is now a full professor since 2019. He has been working in the fields of metamaterials, metasurfaces, and their potential applications in circuits and functional devices, and has published more than 120 papers in scientific journals. He was elected as a fellow of The Institution of Engineering and Technology (IET) in 2019.Shiwei Tang received his Ph.D. in the Physics Department of Fudan University, Shanghai, China, in 2014. He was a postdoctoral fellow in the Materials Science Department of Fudan University from 2014-2015. He joined Ningbo University, Ningbo, China in 2016 and was promoted to an Associate Professor in 2019. His current research interests include metamaterials/metasurfaces, microcavities, plasmonics, and nanophotonics. He has published over 60 papers in journals such as Advanced Materials, Advanced Functional Materials, ACS Nano, and Optics Express.