Refractive Index Sensing with Subradiant Modes: A Framework To Reduce Losses in Plasmonic Nanostructures

Gallinet, Benjamin; Martin, Olivier J. F.

doi:10.1021/nn4021967

Cited by 97 publications

(95 citation statements)

References 56 publications

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“…by placing two meta--atoms in each unit cell, may open up additional design opportunities for surface lattice resonances; initial reports are encouraging 46 . A topic of much debate recently in the plasmonics community has been that of bright and dark modes 52 , i.e. those modes that are dipole--allowed in terms of coupling to far--field radiation (bright) and those that are (largely) dipole forbidden (dark).…”

Section: Collective Excitationsmentioning

confidence: 99%

Plasmonic meta-atoms and metasurfaces

2014

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Despite the extraordinary degree of interest in optical metamaterials in recent years the hoped--for devices and applications have, in large part, yet to emerge, and it is becoming clear that the first generation of metamaterial--based devices will more likely arise from their two--dimensional equivalents, metasurfaces. In this review we describe the recent progress made in the area of metasurfaces formed from plasmonic meta--atoms. In particular we approach the subject from the perspective of the fundamental excitations supported by the meta--atoms and the interactions between them. We also identify some areas ripe for future research, and indicate likely avenues for future device development.

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Section: Collective Excitationsmentioning

confidence: 99%

Plasmonic meta-atoms and metasurfaces

2014

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“…4b. In multimode cases, on the other hand, intricate Fano-like spectral lineshapes 11,[39][40][41][42] can be observed because the perturbation may affect several QNMs, leading to complicated deformation in the spectral lineshapes. One may extend the current perturbation approach to these cases, 11 by considering the interaction of the perturbation with each QNM and obtain more physical insight.…”

Section: Local Field Correctionsmentioning

confidence: 99%

Simple Analytical Expression for the Peak-Frequency Shifts of Plasmonic Resonances for Sensing

2015

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We derive a closed-form expression that accurately predicts the peak frequency-shift and broadening induced by tiny perturbations of plasmonic nanoresonators without critically relying on repeated electrodynamic simulations of the spectral response of nanoresonator for various locations, sizes or shapes of the perturbing objects. The force of the present approach, in comparison with other approaches of the same kind, is that the derivation is supported by a mathematical formalism based on a rigorous normalization of the resonance modes of nanoresonators consisting of lossy and dispersive materials. Accordingly, accurate predictions are obtained for a large range of nanoparticle shapes and sizes, used in various plasmonic nanosensors, even beyond the quasistatic limit. The expression gives quantitative insight, and combined with an open-source code, provides accurate and fast predictions that are ideally suited for preliminary designs or for interpretation of experimental data. It is also valid for photonic resonators with large mode volumes. KEYWORDS: refractive index sensing, surface plasmon resonance, quasi normal mode, nanoparticle, plasmonics Introduction. In recent years, metallic nanoparticles have gained a lot of attention and also witnessed successful applications in various fields of nanosciences. As their near-fields support strong and highly-confined resonances, metallic nanoparticles can effectively convert local changes of refractive index into frequency shifts of the resonance.

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“…where ε ∞ =3.7 is the dielectric constant at the infinite frequency, γ=2.73×10 13 Hz is the electron collision frequency, ω p =1.38×10 16 Hz is the bulk plasma frequency and ω stands for the angular frequency of the incident electromagnetic radiation. In our discussion, the width d is chosen to be 50nm.…”

Section: Model and Theoretical Analysismentioning

confidence: 99%

“…2-4 Optical elements based on SPPs have been widely researched both in theory and experiment, such as filters, [5][6][7] modulators, 8 switches, 9-12 sensors [13][14][15] and so on. For instance, Wang et al 16 proposed a plasmonic filter based on a ring resonator.…”

Section: Introductionmentioning

confidence: 99%

Tunable multimode electromagnetically induced absorption transmission in metal-insulator-metal resonators

et al. 2016

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The tunable multimode electromagnetically induced absorption (EIA)-like transmission was investigated in a two-ring system. In this system, by introducing asymmetry factor δi = λr - λr′, we provided several ways to modulate the EIA-like transmission spectra. An off-to-on EIA-like response could be realized by changing the radius or the refractive index of the rings. During the off-to-on process, we found the red shift and blue shift effects in the spectra are appeared and the widths of EIA-like dips are broadened. Numerical simulation by finite element method was conducted to verify our discussion. We believe all these would provide guidelines to design the useful EIA-like devices.

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Refractive Index Sensing with Subradiant Modes: A Framework To Reduce Losses in Plasmonic Nanostructures

Cited by 97 publications

References 56 publications

Plasmonic meta-atoms and metasurfaces

Plasmonic meta-atoms and metasurfaces

Simple Analytical Expression for the Peak-Frequency Shifts of Plasmonic Resonances for Sensing

Tunable multimode electromagnetically induced absorption transmission in metal-insulator-metal resonators

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