Giant Magnetic Field Enhancement in Hybridized MIM Structures

Alrasheed, Salma; Di, Enzo

doi:10.1109/lpt.2017.2765402

Cited by 4 publications

(5 citation statements)

References 25 publications

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“…Figure 6 compares the characteristics of magnetic resonance modes 27 – 29 excited when the electric field of incident light is parallel to the surface of metal nanodiscs for the conventional MIM configuration (Fig. 6 a) and the VCB nanodiscs (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the scattering quantum yield is significantly improved as the bridge length increases further (not shown here). Figure 6 compares the characteristics of magnetic resonance modes [27][28][29] excited when the electric field of incident light is parallel to the surface of metal nanodiscs for the conventional MIM configuration (Fig. 6a) and the VCB nanodiscs (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Novel nano-plasmonic sensing platform based on vertical conductive bridge

Park

Kwak

et al. 2021

Sci Rep

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A novel nano-plasmonic sensing platform based on vertical conductive bridge was suggested as an alternative geometry for taking full advantages of unique properties of conductive junction while substantially alleviating burdens in lithographic process. The effects of various geometrical parameters on the plasmonic properties were systematically investigated. Theoretical simulation on this structure demonstrates that the presence of vertical conductive bridge with smaller diameter sandwiched between two adjacent thin nanodiscs excites a bridged mode very similar to the charge transfer plasmon and exhibits a remarkable enhancement in the extinction efficiency and the sensitivity when the electric field of incident light is parallel to the conductive bridge. Furthermore, for the electric field perpendicular to the bridge, another interesting feature is observed that two magnetic resonance modes are excited symmetrically through open-gaps on both sides of the bridge together with strongly enhanced electric field intensity, which provides a very favorable environment as a surface enhanced Raman scattering substrate for fluid analysis. These results verify a great potential and versatility of our approach for use as a nanoplasmonic sensing platform. In addition, we demonstrated the feasibility of fabrication process of vertical conductive bridge and high tunability in controlling the bridge width.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Novel nano-plasmonic sensing platform based on vertical conductive bridge

Park

Kwak

et al. 2021

Sci Rep

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“…Dielectric materials have low optical loss and the induced displacement current inside the dielectric nanoparticles can support not only electric multipoles but also magnetic multipoles, which are featured by the circular displacement currents inside the particles [80]. While for plasmonic nanoparticles, magnetic multipoles can only appear with specific structural design, such as split-ring [81] and metal-insulator-metal (MIM) structures [82], due to the vanishing field inside the particles. Besides, Mie resonances can induce a local field enhancement inside the metaatoms, compared to plasmonic resonance with near surface localization.…”

Section: Materials Choice Of Metasurfacesmentioning

confidence: 99%

Dispersion and efficiency engineering of metasurfaces

Zhang¹,

Bai²,

Sun³

2021

Comptes Rendus. Physique

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Metasurfaces, ultrathin two-dimensional arrays of artificially engineered meta-atoms, can impart spatially varying changes towards the incident electromagnetic wave and provide versatile functionalities once unprecedented in sub-wavelength thick natural materials. The wavefront manipulation by metasurfaces usually arises from the strong resonant behaviors of varied meta-atoms in subwavelength lattice, which also brings some drawbacks like the unexpected dispersion due to separate resonances of the meta-atoms and the long concerned low efficiency problem. This paper reviews the recent surge of fruitful works on dispersion and efficiency engineering of metasurfaces and provides an overview of several effective methods to acquire metasurfaces with these distinctive features. Résumé.Les méta-surfaces, des réseaux bi-dimensionnels ultra-fins de méta-atomes artificiels, peuvent transférer les variations spatiales de leur structure au champ électromagnétique et conférer ainsi des fonctionnalités jusqu'alors inégalées dans les matériaux naturels d'épaisseur sous-longueur d'onde. La manipulation du front d'onde par les méta-surfaces est généralement obtenue en exploitant le caractère fortement résonant des méta-atomes dans le réseau sous-longueur d'onde, qui conduit par ailleurs à des inconvénients tels qu'une dispersion inattendue en raison des résonances distinctes des méta-atomes et un problème d'efficacité qui a fait l'objet d'une attention de longue date. Cet article passe en revue les percées récentes des travaux sur ces problématiques de la dispersion et de l'efficacité des méta-surfaces et il donne un aperçu de plusieurs méthodes permettant d'obtenir des méta-surfaces avec des propriétés remarquables.

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“…Thus, although we consider a periodic structure of the silver dimers here, arbitrarily distributions of such dimers, for example, in solutions, can also be utilized as index-controlled continuously-tunable particle detectors. Dimers can be aligned using magnetized metallic material [46,47].…”

Section: Effective Polarizibility and Crmentioning

confidence: 99%

“…Such kinds of periodic structures can be achieved by e-beam lithography techniques [45]. Although here we consider a periodic ordering of the dimers, arbitrary distributions of such nanodimers can also be achieved in solutions when one of the nanorods of the dimer is manufactured via a magnetized metallic material [46,47]. This can be useful for in vitro CR imaging [25].…”

Section: Introductionmentioning

confidence: 99%

Continuously-tunable Cherenkov-radiation-based detectors via plasmon index control

2020

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A recent study [PRB 100, 075427 (2019)], finally, demonstrated the plasmon-analog of refractive index enhancement in metal nanostructures (MNSs), which has already been studied in atomic clouds for several decades. Here, we simply utilize this phenomenon for achieving continuously-tunable enhanced Cherenkov radiation (CR) in MNSs. Beyond enabling CR from slow-moving particles, or increasing its intensity, the phenomenon can be used in continuous-tuning of the velocity cutoff of particles contributing to CR. More influentially, this allows a continuously-tunable analysis of the contributing particles as if the data is collected from many different detectors, which enables data correction. The phenomenon can also be integrated into lattice MNSs, for continuous medium tuning, where a high density of photonic states is present and the threshold for the CR can even be lifted. Additionally, vanishing absorption can heal radiation angle distortion effects caused by the metallic absorption.

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Giant Magnetic Field Enhancement in Hybridized MIM Structures

Cited by 4 publications

References 25 publications

Novel nano-plasmonic sensing platform based on vertical conductive bridge

Novel nano-plasmonic sensing platform based on vertical conductive bridge

Dispersion and efficiency engineering of metasurfaces

Continuously-tunable Cherenkov-radiation-based detectors via plasmon index control

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