Peak splitting and locking behavior arising from Fano interference between localized surface plasmons and cavity modes

Li, Penggang; Li, Ji; Gao, Na; Wang, He; Ge, Shucheng; Huang, Kai; Kang, Junyong; Yu, Edward T.

doi:10.1103/physrevb.99.125420

Cited by 7 publications

(6 citation statements)

References 37 publications

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“…There are almost no polarization charges between these two surfaces. Thus, by regarding the top and bottom surface of the nanocube arrays as two equivalent interfaces with different frequency-dependent polarizability, thin film interference calculations can be established using modified Fresnel equations [20][21][22].…”

Section: Resultsmentioning

confidence: 99%

Dipole-like and quadrupole-like reflection modes for Ag nanocube arrays on dielectric substrates

Li¹,

Cai²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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Localized surface plasmons (LSPs) have a wide range of applications in enhancing the performance of optoelectronic devices. For those applications, LSPs are often located on the surfaces or interfaces between dielectric mediums. Hence, it is necessary to investigate interaction between LSPs and interface. In this paper, we investigate the far-field and near-field LSP behaviors of silver nanocube arrays on a dielectric substrate.Finite-difference time-domain (FDTD) simulation results demonstrate that, when light is incident normally from the vacuum, a much deeper dip between the two peaks corresponding to bonding and anti-bonding modes of the LSPs generated in the metal nanocubes on dielectric mediums, comparing to the case that incident light is from the substrate. The charge distribution diagram shows that these behaviors can be described as a dipole-like mode and a quadrupole-like mode. A model based on the Fano interferences using modified Fresnel equations is employed to explain the physical mechanism of these behaviors. It reveals that this phenomenon is caused by the phase difference between the superimposed dipolar modes generated on the upper and lower interfaces of nanocube. A simplified mathematical model has been built to illustrate that symmetric dips can arise from the Fano interference between two discrete states and one continuum state.

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Section: Resultsmentioning

confidence: 99%

Dipole-like and quadrupole-like reflection modes for Ag nanocube arrays on dielectric substrates

Li¹,

Cai²,

Li³

et al. 2022

J. Phys. D: Appl. Phys.

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“…The surface plasmon waves around the two particles are generated from the electric eld superposition between these waves. Superposing plasmon intensities of two AuNPs with an initial phase difference ( ) as (or ) gives us a quantum superposition of , and consequently yields complex and cumulative superposing plasmon intensities [33]. This can be deduced from Eq.…”

Section: Two-particle Interferencementioning

confidence: 99%

Plasmon Coupling Model Between Wide-field SPR Microscopy and Gold Nanoparticles

Al‐Bataineh

Telfah

Tavares

et al. 2023

Preprint

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The coupling behavior of the wide field surface plasmon microscopy (WF-SPRM) with single-, two-, and multiple-gold nanoparticles (AuNPs) with different AuNPs sizes is investigated using theoretical, simulation, and experimental approaches. The signal intensity of a single AuNP increases from 208 a.u. to 583 a.u. as particle size increases from 40 nm to 80 nm, which shows the signal-building mechanism of Rayleigh scattering theory. A discrete particle model of SPR is used to understand the interaction between an Au-layer and a single AuNP. The calculated intensity profile of the single AuNP from the discrete particle model is accepted with the experimental data. In addition, the superposition between 2-AuNPs surface plasmon waves is studied using the finite element method as well as experimental data from WF-SPRM. The surface plasmon waves around the two particles are generated an interference pattern. Finally, it is demonstrated that plasmonic multiple particles scattering can be represented by an effective media, which is described by Maxwell-Garnet equations.

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“…Among these, strong coupling between photonic cavities and plasmons have been of increasing interest [4,[6][7][8][9][10] since the first demonstration between localized plasmons in nanowire pairs and photonic Fabry-Pérot (F-P) microcavity modes by Ameling and Giessen in 2010 [11]. By combining plasmonic nanostructures and photonic microcavities, it has been demonstrated that the sensing properties of localized plasmon sensors can be enhanced [12][13][14], that up to two-fold enhancement increase can be achieved compared to that without using the cavity [15], that large Rabi splitting can be obtained by embedding nanoparticle-WS 2 heterostructure in an optical microcavity [16,17], and that both peak splitting and peak locking behaviors can be observed [18].…”

Section: Introductionmentioning

confidence: 99%

Strong Coupling between Plasmonic Surface Lattice Resonance and Photonic Microcavity Modes

Shi

Liu

et al. 2022

Photonics

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We report the strong coupling between plasmonic surface lattice resonances (SLRs) and photonic Fabry-Pérot (F-P) resonances in a microcavity embedded with two-dimensional periodic array of metal-insulator-metal nanopillars. For such a plasmonic-photonic system, we show that the SLR can be strongly coupled to the F-P resonances of both the odd- and even orders, and that the splitting energy reaches as high as 153 meV in the visible regime. Taking advantage of the strong coupling, the resulted high-energy upper polariton has similar characteristics as the plasmonic SLR, but the quality factor is almost twice of that of the SLR. We expect that this work will provide a new scheme for strong coupling between plasmonic and photonic modes, and will point to a new direction to improve the quality factor of SLRs.

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Peak splitting and locking behavior arising from Fano interference between localized surface plasmons and cavity modes

Cited by 7 publications

References 37 publications

Dipole-like and quadrupole-like reflection modes for Ag nanocube arrays on dielectric substrates

Dipole-like and quadrupole-like reflection modes for Ag nanocube arrays on dielectric substrates

Plasmon Coupling Model Between Wide-field SPR Microscopy and Gold Nanoparticles

Strong Coupling between Plasmonic Surface Lattice Resonance and Photonic Microcavity Modes

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