Title Multifunctional metasurfaces : design principles and device realizations / He-Xiu Xu, Shiwei Tang, Tong Cai, Shulin Sun, Qiong He, Lei Zhou

Published San Rafael, California (1537 Fourth Street, 1537 Fourth Street, San Rafael, CA 94901 USA) : Morgan & Claypool Publishers, [2021]

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Description 1 online resource (viii, 176 pages) Series Synthesis lectures on materials and optics, 2691-1949 ; 5 Synthesis lectures on materials and optics ; #5 Contents 1 Introduction -- 2. Early attempts on multifunctional metasurfaces : the "merging" concept -- 2.1. Design principles -- 2.2. Reflection-geometry realizations -- 2.3. Transmission-geometry realizations -- 2.4. Issues with the "merging" scheme 3. Multifunctional metasurfaces/metadevices based on single-structure meta-atoms I : linear-polarization excitations -- 3.1. Design principles : efficiency and polarization cross-talk -- 3.2. Reflection-geometry realizations : versatile beam-control metadevices -- 3.3. Transmission-geometry realizations : focusing and beam bending -- 3.4. Full-space wave-control multifunctional metasurfaces -- 3.5. Summary 4. Multifunctional metasurfaces/metadevices based on single-structure meta-atoms II : circular-polarization excitations -- 4.1. Design principles : Pancharatnam-Berry phases -- 4.2. PB metasurfaces in reflection geometry -- 4.3. PB metasurfaces in transmission geometry -- 4.4. PB metasurfaces in full-space geometry -- 4.5. Summary 5. Linearly polarized active multifunctional metasurfaces -- 5.1. Design principles : role of tunable meta-atoms on phase compensations -- 5.2. A bifunctional metadevice exhibiting anomalous-reflection and surface-wave conversion functionalities -- 5.3. Aberration-free and functionality-switchable microwave meta-lenses -- 5.4. Summary 6. Circularly polarized active multifunctional metasurfaces -- 6.1. Design principles -- 6.2. Dynamical control on helicity of electromagnetic waves -- 6.3. Tunable Pancharatnam-Berry metasurfaces -- 6.4. Summary -- 7. Conclusions and perspectives Summary 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 Analysis multifunctional metasurface polarization-dependent helicity control tunable full-space geometric phase propagation phase reflection transmission Bibliography Includes bibliographical references (pages 153-174) Notes Title from PDF title page (viewed on April 2, 2021) Subject Metamaterials. Metasurfaces. Metamaterials Metasurfaces Form Electronic book Author Tang, Shiwei (Ph. D. in physics), author Cai, Tong (Ph. D. in electrical engineering), author Shulin Sun (Ph. D. in physics), author He, Qiong (Ph. D. in physics), author Zhou, Lei (Ph. D. in physics), author ISBN 9781681738956 1681738953 9783031023903 3031023900

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