Isotropic Holographic Metasurfaces for Dual‐Functional Radiations without Mutual Interferences

Li, Yun Bo; Cai, Ben Geng; Cheng, Qiang; Cui, Tie Jun

doi:10.1002/adfm.201503654

Cited by 64 publications

(39 citation statements)

References 30 publications

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“…By combining the phase modulation, polarization manipulation, and dispersion engineering, functional metasurfaces have also been demonstrated to realize different functionalities for separated wavelengths and polarizations, which opens a new avenue for potential engineering applications of metasurfaces.…”

Section: Functional Metasurfaces For Engineering Applicationsmentioning

confidence: 99%

Subwavelength Optical Engineering with Metasurface Waves

Luo

2018

Advanced Optical Materials

164

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Figure 3. Plasmonic superlens and hyperlens. a) Plasmonic EYI effect in structured metal film. Adapted with permission. [46] Copyright 2004, American Institute of Physics (AIP). b) Schematic of the optical system for the demonstration of thin film superlens. Adapted with permission. [49] Figure 11. Multifunctional metasurfaces. a) The far-field intensity distribution of wave-fronts with positive (red) and negative (blue) helicities emerging from segmented, interleaved, and harmonic response metasurfaces composed of gap-plasmon nanoantennas (inset). Adapted with permission. [167] Copyright 2016, AAAS. b) Schematic of the generation of a solid and a hollow spot at two wavelengths and the calculated intensity distribution in the focal plane. Adapted with permission. [12]

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Section: Functional Metasurfaces For Engineering Applicationsmentioning

confidence: 99%

Subwavelength Optical Engineering with Metasurface Waves

Luo

2018

Advanced Optical Materials

164

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“…in ref. []. As shown in Figure a, a surface interference pattern that generates single‐beam linear‐polarized radiation under the excitation of a dipole antenna (port 1) on the edge was adopted as pattern 1.…”

Section: Metasurfaces and Other State‐of‐the‐art Microwave Mtmsmentioning

confidence: 99%

“…Instead, generalized sheet transition condition and methods based on reflection/transmission coefficients and effective surface impedance are usually adopted to describe and analyze the metasurfaces. Since its proposal, a great many exciting effects and devices based on metasurfaces have been manifested, which exhibits strong ability to flexibly manipulate the wavefronts of reflected and transmitted EM waves as well as the far field radiation pattern . With the advantages of small volume, low insertion loss, easy fabrication and integration, metasurfaces have thus drawn significant attention and become one of the most promising aspects in the application of metamaterials.…”

Section: Introductionmentioning

confidence: 99%

Microwave Metamaterials

Chen

Tang

et al. 2019

Annalen der Physik

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Metamaterials (MTMs) are artificial materials composed of subwavelength particles, which are engineered to achieve various electromagnetic (EM) responses. Since the first practical realization and experimental verification of MTMs by Pendry et al. in the late 1990s, great efforts have been made in theoretical study as well as practical utilizations. Among them, the effective medium theory provides a basis for the description as well as an accurate method for the design of MTMs, and leads to the development of many novel devices with interesting functionalities. With the employment of transformation and geometric optics, more high-performance engineering applications have been realized using MTMs. Recently, the concept of metasurfaces has been proposed, which further promotes the practical applications of advanced MTMs. Herein, the effective medium theory is first introduced. After that, typical devices and applications based on conventional bulk MTMs and newly-conceived metasurfaces are summarized to demonstrate the flexible capability of microwave MTMs in the manipulation of EM waves.Metamaterials are different from other periodic structures such as photonic crystals and frequency-selective surfaces (FSSs) because their unit cells are much smaller than the free-space wavelength. The subwavelength nature enables the metamaterials to Tianyi Chen received his B.Sc. degree from Southeast University, Nanjing, China, in 2013. He is currently working toward a Ph.D. degree in State Key Laboratory of Millimeter Waves at Southeast University. His research interests include metamaterials metasurfaces and antenna arrays. Wenxuan Tang received her B.Sc. and M.Sc. degrees from Southeast University, Nanjing, China, in Cheung-Kong Professor. His research interests include metamaterials, plasmonics in microwave, and computational electromagnetics.be treated as a homogenous effective medium and characterized by effective constitutive parameters. In early researches, closed formed expressions for the constitutive parameters were obtained in static and quasistatic limits, [86][87][88] which usually takes the form of Lorentz-Drude models. These results provided some intuition of the physical features but cannot quantitatively characterize metamaterials. In ref.[18], a numerical approach based on scattering (S) parameter retrieval was proposed to obtain the effective permittivity and permeability for periodic metamaterial structures. This method is accurate in the derivation of effective parameters. However it relies on full-wave simulation of metamaterial structures and hence is inefficient and difficult to be used in the design of large-volume metamaterials.In 2007, a general effective medium theory [17] was proposed by Liu et al., which sets up a relationship between particle responses and macroscopic behaviors of metamaterials. A closed form expression was provided to modify the Lorentz-Drude model, which takes the effects of spatial dispersion into account

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“…Recently, the rapid progress in the manipulation of electromagnetic (EM) waves has been achieved owing to the emergence of metasurface . As a 2D metamaterial, metasurface made of periodically or nonperiodically arranged subwavelength metaparticles on a ultrathin surface has the strong capability of controlling wavefront of light by introducing abrupt phase changes over the wavelength scale.…”

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confidence: 99%

“…Nevertheless, most of aforementioned metasurfaces are composed of passive metaparticles and generally behave one EM functionality, which cannot satisfy the largely increasing demand of multifunctional devices. Although several substantial efforts have been devoted to combine the multiple EM functionalities into one single metasurface, the realized multifunctionalities can only be acquired at different polarization states or frequencies …”

mentioning

confidence: 99%

Reconfigurable Metasurface for Multifunctional Control of Electromagnetic Waves

Huang

Zhang

Yang

et al. 2017

Advanced Optical Materials

220

111

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and holographic plates. [12,13] Nevertheless, most of aforementioned metasurfaces are composed of passive metaparticles and generally behave one EM functionality, which cannot satisfy the largely increasing demand of multifunctional devices. Although several substantial efforts have been devoted to combine the multiple EM functionalities into one single metasurface, the realized multifunctionalities can only be acquired at different polarization states or frequencies. [14][15][16][17][18] More recently, much more attention has been focused on the design of reconfigurable metasurfaces by employing tunable metaparticles driven by thermal effect, [19,20] electrical tuning, [21,22] mechanically stretching, [23,24] and so on. The realistic possibility of reconfigurable metasurfaces has been demonstrated in optical, terahertz, and microwave regions, accompanied by the emergence of interesting applications, such as beam steering, [25,26] tunable absorbing, [27,28] chiral polarization switching, [29,30] and so on. The reconfigurability of metasurface in optical and terahertz domains is generally realized by exploiting the active medias, including graphene, [31] liquid crystal, [32] vanadium dioxide, [33] and Ge 2 Sb 2 Te 5 (GST). [34,35] In the microwave region, metasurfaces achieve the tunable EM responses through the general method of integrating discrete elements such as varactor diodes, [36,37] PIN diode switches, [38,39] and MEMS switches [40] within the metaparticles. In ref.[28], the metasurface with varactor diodes involved was proposed to tune the absorbing frequency. In ref.[38], the PIN diodes were adopted to design the polarization-reconfigurable metasurface that can dynamically control the handedness of the circularly polarized wave. The above lumped components have also been used to achieve the dynamical control of EM wavefront. [40] However, most of the realized tunable metasurface focused on the reconfiguration of a single one function (e.g., absorbing frequency, polarization feature, and beam deflection angle). The latest efforts started to be devoted to the design of multifunctional metasurface that integrates diversified functionalities into a monolayer metastructure. [39,41] In ref.[39], microelectromechanical system (MEMS) technology was utilized to construct the metasurface with tunable resonance for obtaining 360° phase span, and based on the phase modulation, the multifunctionalities, including polarization control, wavefront deflection and holograms, have been numerically demonstrated. In ref.[41], a programmable metasurface was reported Metasurfaces provide a novel strategy to manipulate electromagnetic (EM) waves by controlling the local phase of subwavelength artificial structures within the wavelength scale. So far, many exciting devices have been developed and most of them are based on passive metasurface, which can only perform a specific functionality. It is still very challenging to simultaneously achieve multiple EM functionalities and real-time reconfigurability in one design. This stud...

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Isotropic Holographic Metasurfaces for Dual‐Functional Radiations without Mutual Interferences

Cited by 64 publications

References 30 publications

Subwavelength Optical Engineering with Metasurface Waves

Subwavelength Optical Engineering with Metasurface Waves

Microwave Metamaterials

Reconfigurable Metasurface for Multifunctional Control of Electromagnetic Waves

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