Plasmonic Enhancement of Molecular Fluorescence near Silver Nanoparticles: Theory, Modeling, and Experiment

Гузатов, Д. В.; Vaschenko, S. V.; Станкевич, В. В.; Lunevich, Anatoly Ya.; Glukhov, Yuri F.; Гапоненко, С. В.

doi:10.1021/jp301598w

Cited by 158 publications

(160 citation statements)

References 52 publications

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“…The calculation scheme has been described elsewhere. 11 The most favorable case is considered of a dipole moment oriented along the line connecting an emitter with a NP center. The electroluminescence intensity enhancement factor F, i. e., change in the emission intensity I near metal versus intensity I 0 without metal equals the quantum yield change, reads,…”

Section: A the Modelmentioning

confidence: 99%

Plasmonic enhancement of electroluminescence

2018

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Here plasmonic effect specifically on electroluminescence (EL) is studied in terms of radiative and nonradiative decay rates for a dipole near a metal spherical nanoparticle (NP). Contribution from scattering is taken into account and is shown to play a decisive role in EL enhancement owing to pronounced size-dependent radiative decay enhancement and weak size effect on non-radiative counterpart. Unlike photoluminescence where local incident field factor mainly determines the enhancement possibility and level, EL enhancement is only possible by means of quantum yield rise, EL enhancement being feasible only for an intrinsic quantum yield Q0 < 1. The resulting plasmonic effect is independent of intrinsic emitter lifetime but is exclusively defined by the value of Q0, emission spectrum, NP diameter and emitter-metal spacing. For 0.1< Q0 < 0.25, Ag nanoparticles are shown to enhance LED/OLED intensity by several times over the whole visible whereas Au particles feature lower effect within the red-orange range only. Independently of positive effect on quantum yield, metal nanoparticles embedded in an electroluminescent device will improve its efficiency at high currents owing to enhanced overall recombination rate which will diminish manifestation of Auger processes. The latter are believed to be responsible for the known undesirable efficiency droop in semiconductor commercial quantum well based LEDs at higher current. For the same reason plasmonics can diminish quantum dot photodegradation from Auger process induced non-radiative recombination and photoionization thus opening a way to avoid negative Auger effects in emerging colloidal semiconductor LEDs.

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Section: A the Modelmentioning

confidence: 99%

Plasmonic enhancement of electroluminescence

2018

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“…The fluorescence enhancement factor F d0 is defined as the ratio between the observed emission intensities in the presence and in the absence of the sphere in the vicinity of the optical emitter [38][39][40]. In the absence of the sphere, the observed emission intensity is I 0 = |d 0 · E in | 2 ζ A Q 0 , where ζ A and Q 0 are the absorption coefficient (which depends on the emitter polarizability) and the quantum yield of the optical emitter, respectively.…”

Section: Decay Rates and Fluorescence Enhancement In The Vicinitymentioning

confidence: 99%

“…Here, we assume that the absorption coefficient of light ζ A by an optical dipole emitter is intensity independent and remains the same as in vacuum [39]. We also assume that the quantum yield Q d0 depends only on the sphere.…”

Section: Decay Rates and Fluorescence Enhancement In The Vicinitymentioning

confidence: 99%

Fano resonances and fluorescence enhancement of a dipole emitter near a plasmonic nanoshell

et al. 2017

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We analytically study the spontaneous emission of a single optical dipole emitter in the vicinity of a plasmonic nanoshell, based on the Lorenz-Mie theory. We show that the fluorescence enhancement due to the coupling between optical emitter and sphere can be tuned by the thickness ratio of the core-shell nanosphere and by the distance between the quantum emitter and its surface. In particular, we demonstrate that both the enhancement and quenching of the fluorescence intensity are associated with plasmonic Fano resonances induced by near-and far-field interactions. These Fano resonances have asymmetry parameters whose signs depend on the orientation of the dipole with respect to the spherical nanoshell. We also show that if the atomic dipole is oriented tangentially to the nanoshell, the interaction exhibits saddle points in the near-field energy flow. This results in a Lorentzian fluorescence enhancement response in the near field and a Fano lineshape in the far field. The signatures of this interaction may have interesting applications for sensing the presence and the orientation of optical emitters in close proximity to plasmonic nanoshells.

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“…The intriguing features of these systems arise from the hybridization of different types of optical excitations, in particular, excitons (in the quantum emitter) and plasmons (in the metal). The exciton-plasmon coupling can drastically modify the optical response of hybrids, leading to interesting physical phenomena, such as optical bistability [8][9][10][11][12], exciton-induced transparency [13], enhancement of Rabi oscillations [14], suppression of quantum coherence via infrared-driven coherent exciton-plasmon coupling [15,16], florescence [17,18], Förster energy transfer [19][20][21][22], photoluminescence quenching [23], Fano-like absorption [8,[24][25][26][27][28], and other exciting effects [29][30][31][32][33][34]. These phenomena may have a strong impact on the development of active nanophotonic devices and metamaterials (e.g., optical switches, singlephoton sources, biosensors).…”

Section: Introductionmentioning

confidence: 99%

Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle

2015

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Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle Nugroho, Bintoro S.; Malyshev, V.A.; Knoester, Jasper IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Publication date: 2015Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Nugroho, B. S., Malyshev, V. A., & Knoester, J. (2015). Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle. Physical Review B, 92(16), [165432]. DOI: 10.1103/PhysRevB.92.165432 Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. We study theoretically the optical response of a nanohybrid comprising a symmetric quantum dimer emitter coupled to a metal nanoparticle (MNP). The interactions between the exitonic transitions in the dimer and the plasmons in the MNP lead to interesting effects in the composite's input-output characteristics for the light intensity and the absorption spectrum, which we study in the linear and nonlinear regimes. We find that the exciton-plasmon hybridization leads to optical bistability and hysteresis for the one-exciton transition and enhancement of excitation for the two-exciton transition. The latter leads to a significant decrease in the field strength needed to saturate the system. In the linear regime, the absorption spectrum has a dispersive (Fano-like) line shape. The spectral position and shape of this spectrum depend on the detuning of the dimer's one-exciton resonance relative to the plasmon resonance and the ratio of the exciton-plasmon coupling constant to the exciton dephasing rate. When the applied field intensity to the nonlinear regime is increased, the Fano-like singularities in the absorption spectra are smeared and they disappear due to saturation of the dimer, which leads to the MNP dominating the spectrum. The above effects, for which we provide physical explanations, allow one to tailor the Fano-like shape of the absorption spectrum, by changing either the detuning or the input power.

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Plasmonic Enhancement of Molecular Fluorescence near Silver Nanoparticles: Theory, Modeling, and Experiment

Cited by 158 publications

References 52 publications

Plasmonic enhancement of electroluminescence

Plasmonic enhancement of electroluminescence

Fano resonances and fluorescence enhancement of a dipole emitter near a plasmonic nanoshell

Tailoring optical response of a hybrid comprising a quantum dimer emitter strongly coupled to a metallic nanoparticle

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