A General Recipe for Nondispersive Optical Activity in Bilayer Chiral Metamaterials

Park, Hyun Sung; Park, Jagang; Son, Juhee; Kim, Yushin; Cho, Hyukjoon; Shin, Jonghwa; Jeon, Wonju; Min, Bumki

doi:10.1002/adom.201801729

Cited by 10 publications

(14 citation statements)

References 56 publications

(52 reference statements)

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“…[68], in which a frequency-independent geometric feature (e.g., the orientation of the out-coupling antenna) determines the orientation of the plane of polarization on the output side. In one recent study, even in the absence of complex 3D metallic structures, dispersion-less polarization rotation was achieved with magnetic coupling between two separate metal layers, while electric coupling was minimized ( Figure 5C) [69].…”

Section: Chiralitymentioning

confidence: 88%

Broadband metamaterials and metasurfaces: a review from the perspectives of materials and devices

Jung

Park

et al. 2020

Nanophotonics

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AbstractMetamaterials can possess extraordinary properties not readily available in nature. While most of the early metamaterials had narrow frequency bandwidth of operation, many recent works have focused on how to implement exotic properties and functions over broad bandwidth for practical applications. Here, we provide two definitions of broadband operation in terms of effective material properties and device functionality, suitable for describing materials and devices, respectively, and overview existing broadband metamaterial designs in such two categories. Broadband metamaterials with nearly constant effective material properties are discussed in the materials part, and broadband absorbers, lens, and hologram devices based on metamaterials and metasurfaces are discussed in the devices part.

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Section: Chiralitymentioning

confidence: 88%

Broadband metamaterials and metasurfaces: a review from the perspectives of materials and devices

Jung

Park

et al. 2020

Nanophotonics

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“…[258][259][260] In Figure 5, diagrammatic renderings and SEM images of different types of chiral metamaterials are demonstrated. [261][262][263][264][265][266] Among numerous applications of chiral metamaterials, chiroptical effects have received copious interest recently for designing plasmonic biomolecular sensors. [252,253,[270][271][272][273][274][275] Possessing significant advantages compared to the conventional extinction spectroscopy-based sensing methods, chiral metasensors have been introduced as promising platforms for molecular biosensing purposes.…”

Section: Chiral Metasensorsmentioning

confidence: 99%

Photonic and Plasmonic Metasensors

Ahmadivand

Gerislioglu

2021

Laser & Photonics Reviews

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Biosensors have been designed and developed for detecting biomarkers, biomolecules, proteins, enzymes, organisms, and various types of bacterial and viral diseases since the turn of the century. Initially marred by poor sensitivity, specificity, and selectivity, the advent of the notion of photonic biosensors has successfully addressed such drawbacks. One of the hallmarks of modern pharmaceutical industries is the miniaturization of photonic platforms via continuous scaling down of their sizes, which was accomplished by leveraging the concept of artificial media. Numerous forms of photonic and plasmonic devices have been configured for next-generation technologies since the emergence of metamaterials. Among diverse applications, the development of cost-effective, label-free, selective, precise, and on-chip immunobiosensors with rapid sample-to-result feature has received copious interest, recently. This focused Review brings clarity to the rapidly growing body of available and in-development metamaterials-enabled diagnostic instruments based on inventive and promising approaches. Through centering on the operating principles of plasmonic, photonic, and hybrid metasensors, we mechanistically characterize and describe the properties of such tools and summarize the most recent achievements in devising metasensors and bioimaging tools with high precision. This insightful understanding serves as a comprehensive source for scientists, physicians, and students to construct ultradense and high-throughput clinical screening metadevices.

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“…In an effort to lower the complexity in fabrication and enable high frequency operation, a Lagrangian approach has been taken for solving this problem more systematically. [51] The Lagrangian model reveals that nondispersive optical activity can be observed in a bilayer chiral metamaterial when interlayer www.advmat.de www.advancedsciencenews.com magnetic coupling is strongly activated with its electric counterpart being eliminated. The proposed bilayer chiral metamaterial is schematically shown in Figure 4a.…”

Section: Metamaterials For Nondispersive Optical Activitiesmentioning

confidence: 99%

“…[109][110][111] While mechanically exfoliated graphene may be considered to be ideal, epitaxial growth methods, for example, chemical vapor deposition (CVD), have also drawn a lot of interest due to their capability of large-scale graphene production with reasonable a-e) Reproduced with permission. [51] Copyright 2019, Wiley-VCH.…”

Section: Fabrication Issues and Gating Structures For Graphene Metamamentioning

confidence: 99%

Metamaterials for Enhanced Optical Responses and their Application to Active Control of Terahertz Waves

et al. 2020

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Metamaterials, artificially constructed structures that mimic lattices in natural materials, have made numerous contributions to the development of unconventional optical devices. With an increasing demand for more diverse functionalities, terahertz (THz) metamaterials are also expanding their domain, from the realm of mere passive devices to the broader area where functionalized active THz devices are particularly required. A brief review on THz metamaterials is given with a focus on research conducted in the authors' group. The first part is centered on enhanced THz optical responses from tightly coupled meta‐atom structures, such as high refractive index, enhanced optical activity, anomalous wavelength scaling, large phase retardation, and nondispersive polarization rotation. Next, electrically gated graphene metamaterials are reviewed with an emphasis on the functionalization of enhanced THz optical responses. Finally, the linear frequency conversion of THz waves in a rapidly time‐variant THz metamaterial is briefly discussed in the more general context of spatiotemporal control of light.

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A General Recipe for Nondispersive Optical Activity in Bilayer Chiral Metamaterials

Cited by 10 publications

References 56 publications

Broadband metamaterials and metasurfaces: a review from the perspectives of materials and devices

Broadband metamaterials and metasurfaces: a review from the perspectives of materials and devices

Photonic and Plasmonic Metasensors

Metamaterials for Enhanced Optical Responses and their Application to Active Control of Terahertz Waves

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