Construction of a chiral metamaterial with a U-shaped resonator assembly

Xiong, Xiang; Sun, Wei; Bao, Yong Jun; Wang, Mu; Peng, Rw; Sun, Cheng; Lu, Wu; Shao, Jianda; Li, Zhi Feng; Ming, Nai Ben

doi:10.1103/physrevb.81.075119

Cited by 141 publications

(123 citation statements)

References 44 publications

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“…The designs include bilayered rosette, 50 cross-wire, 51 and U-shaped structures. 52 The patterns on each layer are mutually twisted by an angle, giving rise to an extremely considerable optical rotation and consequently a negative refractive index. Readers can refer to a recent review paper on chiral metamaterials for more information.…”

Section: Chiral Metamaterialsmentioning

confidence: 99%

Metamaterials: a new frontier of science and technology

Liu¹,

2011

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Metamaterials, artificial composite structures with exotic material properties, have emerged as a new frontier of science involving physics, material science, engineering and chemistry. This critical review focuses on the fundamentals, recent progresses and future directions in the research of electromagnetic metamaterials. An introduction to metamaterials followed by a detailed elaboration on how to design unprecedented electromagnetic properties of metamaterials is presented. A number of intriguing phenomena and applications associated with metamaterials are discussed, including negative refraction, sub-diffraction-limited imaging, strong optical activities in chiral metamaterials, interaction of meta-atoms and transformation optics. Finally, we offer an outlook on future directions of metamaterials research including but not limited to three-dimensional optical metamaterials, nonlinear metamaterials and ''quantum'' perspectives of metamaterials (142 references).

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Section: Chiral Metamaterialsmentioning

confidence: 99%

Metamaterials: a new frontier of science and technology

Liu¹,

2011

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“…While the number of functional layers accessible along these lines is not conceptually limited, the structures published so far have actually been restricted to a few functional layers only, with a maximum of five 32 . Chiral structures are readily accessible using this approach and have led to huge circular dichroism and optical activity at optical frequencies 38,39 , but not yet to negative refractive indices-in contrast to microwave [40][41][42] and far-infrared frequencies [43][44][45] . In Fig.…”

Section: The Unit Cell Goes Three-dimensionalmentioning

confidence: 99%

“…In Fig. 3, we summarize the progress of chiral metamaterials [38][39][40][41][42][43][44][45] using this fabrication technique. For the first time, tunable chiral metamaterials were experimentally fabricated, and exhibit tunable optical activity and a tunable refractive index 45 .…”

Section: The Unit Cell Goes Three-dimensionalmentioning

confidence: 99%

“…Oblique-view electron micrograph of a fabricated sample and normal-view large-area electron micrograph of a right-handed structure [38]. Stacked electron-beam lithography: Figure 2(b) shows a structure (chiral or multi-layer SRRs) accessible via a more general stacking approach that has been followed by several groups 12,[35][36][37][38][39][44][45] . Here, a first layer of unit cells, e.g., composed of split-ring resonators, is fabricated by electron-beam lithography and subsequently planarization.…”

Section: The Unit Cell Goes Three-dimensionalmentioning

confidence: 99%

“…22,24,28,[30][31][32] , (b) "stereo-" or chiral metamaterials (see also Fig. 3) via stacked electron-beam lithography 12,[35][36][37][38][39][44][45] , (c) chiral metamaterials made via direct-laser writing and electroplating 46 , (d) hyperbolic (or indefinite) metamaterial 51,[53][54][55][56][57][58] that can be made by electroplating of hexagonal-hole-array templates 57 , (e) metaldielectric layered metamaterial composed of coupled plasmonic waveguides enabling angle-independent negative refraction for particular frequencies 52,53 , (f) split-ring resonators oriented in all three dimensions accessible via membrane projection lithography 59 , (g) wide-angle visible negative-index metamaterial based on a coaxial design 97 , (h) blueprint for a connected cubic-symmetry negative-index metamaterial structure amenable to direct laser writing 60 , (i) blueprint for a metal cluster-of-clusters visible-frequency magnetic metamaterial amenable to large-area selfassembly 61 , and (j) blueprint for an all-dielectric negative-index metamaterial composed of two sets of high-refractiveindex dielectric spheres arranged on a simple-cubic lattice [62][63][64][65]75 .…”

Section: Metamaterials Go Opticalmentioning

confidence: 99%

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Past achievements and future challenges in the development of three-dimensional photonic metamaterials

2011

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Photonic metamaterials are man-made structures composed of tailored micro-or nanostructured metallo-dielectric sub-wavelength building blocks that are densely packed into an effective material. This deceptively simple, yet powerful, truly revolutionary concept allows for achieving novel, unusual, and sometimes even unheard-of optical properties, such as magnetism at optical frequencies, negative refractive indices, large positive refractive indices, zero reflection via impedance matching, perfect absorption, giant circular dichroism, or enhanced nonlinear optical properties. Possible applications of metamaterials comprise ultrahigh-resolution imaging systems, compact polarization optics, and cloaking devices. This review describes the experimental progress recently made fabricating three-dimensional metamaterial structures and discusses some remaining future challenges.

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Temperature‐Controlled Optical Activity and Negative Refractive Index

Plum

et al. 2021

Adv Funct Materials

103

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Chiral media exhibit optical activity, which manifests itself as differential retardation and attenuation of circularly polarized electromagnetic waves of opposite handedness. This effect can be described by different refractive indices for left-and right-handed waves and yields a negative index in extreme cases. Here, active control of chirality, optical activity, and refractive index is demonstrated. These phenomena are observed in a terahertz metamaterial based on 3D-chiral metallic resonators and achiral vanadium dioxide inclusions. The chiral structure exhibits pronounced optical activity and a negative refractive index at room temperature when vanadium dioxide is in its insulating phase. Upon heating, the insulator-to-metal phase transition of vanadium dioxide effectively renders the structure achiral, resulting in absence of optical activity and a positive refractive index. The origin of the structure's chiral response is traced to magnetic coupling between front and back of the structure, whereas the temperature-controlled chiral-to-achiral transition is found to correspond to a transition from magnetic to electric dipole excitations. The use of a fourfold rotationally symmetric design avoids linear birefringence and dichroism, allowing such a structure to operate as tunable polarization rotator, adjustable linear polarization converter, and switchable circular polarizer.

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Construction of a chiral metamaterial with a U-shaped resonator assembly

Cited by 141 publications

References 44 publications

Metamaterials: a new frontier of science and technology

Metamaterials: a new frontier of science and technology

Past achievements and future challenges in the development of three-dimensional photonic metamaterials

Temperature‐Controlled Optical Activity and Negative Refractive Index

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