Mimicking Localized Surface Plasmons with Structural Dispersion

Li, Zhuo; Liu, Liangliang; Fernández‐Domínguez, Antonio I.; Shi, Jianfeng; Gu, Changzhi; García‐Vidal, F. J.; Luo, Yu

doi:10.1002/adom.201900118

Cited by 30 publications

(17 citation statements)

References 39 publications

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“…4 (a), as a function of the dimensionless radius R, we report the µ M values supporting the l * = 1 MLSP resonance, evaluated by using Eq. (7). In Fig.…”

Section: Spoof Mlsps Supported By a High-index Dielectric Spherementioning

confidence: 98%

“…To overcome this issue, Pendry et al [2] proposed metamaterial (MM) structures supporting the so-called spoof or designer surface plasmons. Indeed, they suggested that a MM with an effective negative permittivity can spoof the standard optical surface plasmons at the desired low frequency [3][4][5][6][7][8][9][10]. In addition, a suitable designed MM structure can exhibit artificial magnetic properties, thus an effective negative permeability MM can support spoof magnetic surface plasmon polaritons or spoof magnetic localized surface plasmons (MLSPs) [11][12][13][14][15], the magnetic counterparts of the electric surface plasmon waves.…”

Section: Introductionmentioning

confidence: 99%

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Theory of Spoof Magnetic Localized Surface Plasmons Beyond Effective Medium Approximations

Rizza¹,

Galante²,

Palange³

et al. 2020

Preprint

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A homogeneous negative permeability sphere can support magnetic localized surface plasmons (MLSPs). Generally, negative permeability materials are metamaterial (MM) structures exhibiting very deep subwavelength spatial scales, whose effects may be detrimental in the near-field for those applications based on effective medium approximations. We suggest to overcome this fundamental limitation by demonstrating analytically that the electromagnetic spatial distribution, associated to a MLSP resonance and excited by a near-field source, can be accurately reproduced outside the sphere by substituting the negative permeability sphere with a homogeneous high-index dielectric one with the same radius. Considering that a large class of ferroelectric materials shows ultrahigh dielectric constant and low-losses at low frequency (up to GHz), our spoof MLSPs theory could be a key tool for realizing high performance subwavelength magnetic photonic devices in the radiofrequency and microwave regions.

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“…4 (a), as a function of the dimensionless radius R, we report the µ M values supporting the l * = 1 MLSP resonance, evaluated by using Eq. (7). In Fig.…”

Section: Spoof Mlsps Supported By a High-index Dielectric Spherementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Theory of Spoof Magnetic Localized Surface Plasmons Beyond Effective Medium Approximations

Rizza¹,

Galante²,

Palange³

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…[ 20 ] Numerous novel plasmonic phenomena, which are theoretically or numerically predicted but are difficult to realize in optical frequencies, have been experimentally demonstrated in microwave bands for convenient manipulations of subwavelength structures. [ 21–23 ] However, the bulky volume prohibits microwave plasmonics from real applications.…”

Section: Introductionmentioning

confidence: 99%

Spoof Localized Surface Plasmons for Sensing Applications

Zhang

Cui

et al. 2021

Adv Materials Technologies

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Localized surface plasmons (LSPs) are localized oscillations of free electrons in metal nanoparticles at optical frequencies. Confined mode profiles and near‐field enhancements make LSPs ultrasensitive to the dielectric environment, making them good candidates as sensors. The concept and applications have been generalized to spoof LSPs in microwave and terahertz frequencies, via plasmonic metamaterials composed of subwavelength corrugations. Herein, the basic physics, sensing prototypes, detection schemes, and state‐of‐the‐art progress are broadly reviewed from optical LSP sensing to microwave spoof LSP sensing. While optical LSPs exhibit localized sensitivity enhancement with high attenuation, spoof LSPs in microwave and terahertz frequencies combine the characteristics of deep‐subwavelength confinement and sensitivity enhancement of optical LSPs with low loss, high quality factor, multipole modes, and on‐chip detection of optical microcavities. Meanwhile, advances in printed circuits, integrated circuits, wireless communications, wearable devices, and Internet of things have endowed microwave sensing with a solid technical foundation and promising prospects. Applications in liquid sensing, gas sensing, and wearable sensing are demonstrated. Discussions are extended to electromagnetic sensing throughout the wave spectra, with concerns about key supporting technologies. The prospect of microwave sensing is emphatically investigated, specifically on leveraging the advantages of plasmonic enhancement.

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“…Such local maxima in the corresponding spectra or signals of metamaterials can be used as the eigenvalues or indications to improve the sensing accuracy and selectivity to enable the super-resolution detection of ambient environment, even with extremely small amounts of analytes [ 52 , 53 ]. For example, most EM metamaterials involve metallic nanostructures because metal nanostructures enable the occurrence of the localized surface plasmon resonance (LSPR) phenomenon, which is the collective but non-propagating oscillations of surface electrons in the metal nanostructures [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 ]. LSPR can lead to the significant EM enhancement, altering the light-matter interaction with different absorption, reflection, and transmission properties, resulting in different characterization techniques like plasmon-enhanced fluorescence, surface-enhanced infrared absorption spectroscopy, and surface-enhanced Raman scattering [ 63 ].…”

Section: Introductionmentioning

confidence: 99%

Metamaterials-Enabled Sensing for Human-Machine Interfacing

2020

Sensors

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Our modern lives have been radically revolutionized by mechanical or electric machines that redefine and recreate the way we work, communicate, entertain, and travel. Whether being perceived or not, human-machine interfacing (HMI) technologies have been extensively employed in our daily lives, and only when the machines can sense the ambient through various signals, they can respond to human commands for finishing desired tasks. Metamaterials have offered a great platform to develop the sensing materials and devices from different disciplines with very high accuracy, thus enabling the great potential for HMI applications. For this regard, significant progresses have been achieved in the recent decade, but haven’t been reviewed systematically yet. In the Review, we introduce the working principle, state-of-the-art sensing metamaterials, and the corresponding enabled HMI applications. For practical HMI applications, four kinds of signals are usually used, i.e., light, heat, sound, and force, and therefore the progresses in these four aspects are discussed in particular. Finally, the future directions for the metamaterials-based HMI applications are outlined and discussed.

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Mimicking Localized Surface Plasmons with Structural Dispersion

Cited by 30 publications

References 39 publications

Theory of Spoof Magnetic Localized Surface Plasmons Beyond Effective Medium Approximations

Theory of Spoof Magnetic Localized Surface Plasmons Beyond Effective Medium Approximations

Spoof Localized Surface Plasmons for Sensing Applications

Metamaterials-Enabled Sensing for Human-Machine Interfacing

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