Simultaneous Excitation and Emission Enhancement of Fluorescence Assisted by Double Plasmon Modes of Gold Nanorods

Liu, Si-Yun; Huang, Lu; Li, Jiafang; Wang, Chen; Li, Qiang; Xu, Hongxing; Guo, Honglian; Meng, Ziming; Shi, Zhe; Li, Zhiyuan

doi:10.1021/jp4001626

Cited by 125 publications

(110 citation statements)

References 48 publications

(63 reference statements)

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“…The presence of LSPRs on plasmonic metal nanostructures can enhance the fluorescence signal from locally situated fluorophores, a process known as surface enhanced fluorescence (SEF) [16][17][18]. A fluorophore in the vicinity of a metal nanostructure which supports LSPRs can experience both enhancements of non-radiative and radiative decay rates [19][20][21][22][23][24][25].…”

Section: Papermentioning

confidence: 99%

Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

Damm

Fedele

Murphy

et al. 2015

Applied Physics Letters

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Here, we demonstrate that quasi self-standing Au nanorod arrays prepared with plasma polymerisation deposited SiO2 dielectric spacers support surface enhanced fluorescence (SEF) while maintaining high signal reproducibility. We show that it is possible to find a balance between enhanced radiative and non-radiative decay rates at which the fluorescent intensity is maximized. The SEF signal optimised with a 30 nm spacer layer thickness showed a 3.5-fold enhancement with a signal variance of <15% thereby keeping the integrity of the nanorod array. We also demonstrate the decreased importance of obtaining resonance conditions when localized surface plasmon resonance is positioned within the spectral region of Au interband transitions. Procedures for further increasing the SEF enhancement factor are also discussed.

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Section: Papermentioning

confidence: 99%

Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

Damm

Fedele

Murphy

et al. 2015

Applied Physics Letters

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“…This structure can be fabricated according to previously published methods [31], [32]. A similar structure has been fabricated through a chemical covalent-bonding method for serving as a plasmonic nanolaser with a spherical gold core [31], or as fluorescence enhancement with Au NRs coated with an Oxazine-725 dye molecule-doped silica shell [32]. In the present paper, we will show that the core-shell nanostructure can be used effectively to enhance nonlinear harmonic generation.…”

Section: Simulations and Discussionmentioning

confidence: 99%

“…The material of the active shell is silica-doped with optical gain inclusions (e.g., organic dyes, rare-earth ions). This structure can be fabricated according to previously published methods [31], [32]. A similar structure has been fabricated through a chemical covalent-bonding method for serving as a plasmonic nanolaser with a spherical gold core [31], or as fluorescence enhancement with Au NRs coated with an Oxazine-725 dye molecule-doped silica shell [32].…”

Section: Simulations and Discussionmentioning

confidence: 99%

Significantly Enhanced Third Harmonic Generation Using Individual Au Nanorods Coated With Gain Materials

et al. 2015

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We propose a novel design to enhance third harmonic generation (THG) using individual Au nanorods (NRs) coated with gain materials. The present design avoids the use of conventional gap systems, where complicated semiconductor techniques must be used in order to realize the corresponding high-resolution planar structures. As such, this design can contribute to a significant THG enhancement from nanoparticles; this THG is especially favorable for many applications (e.g., photovoltaic devices, bioimaging, and therapy). We perform numerical simulations using a finite-difference time domain (FDTD) in order to identify the origin of the enhanced nonlinear response based on the present system. In addition, we present an effective method to characterize the third harmonics by using Fourier analysis separating them from the excited light. The results show that the THG enhancement of the gain-assisted Au NR with a critical gain coefficient is one to two orders of magnitude greater than the highest values reported for gap THG systems.

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“…28,29) and also for metal nanoparticles embedded in an ambient material with refractive index n m > 1. The latter corresponds to decrease of radiation wavelength in the ambient medium as compared to nanobody size thus resulting in enhanced scattering which in turn leads to higher extinction.…”

Section: -6mentioning

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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Simultaneous Excitation and Emission Enhancement of Fluorescence Assisted by Double Plasmon Modes of Gold Nanorods

Cited by 125 publications

References 48 publications

Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

Plasmon enhanced fluorescence studies from aligned gold nanorod arrays modified with SiO2 spacer layers

Significantly Enhanced Third Harmonic Generation Using Individual Au Nanorods Coated With Gain Materials

Plasmonic enhancement of electroluminescence

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