Fluorescence and Raman Scattering in Plasmonic Nano-structures: From Basic Science to Applications

Гапоненко, С. В.

doi:10.1007/978-94-017-9133-5_15

Cited by 2 publications

(1 citation statement)

References 58 publications

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“…These two processes -the excitation and the emission -contribute to the fluorescence of the emitter [5]. Plasmonicenhanced fluorescence has several applications [6], spanning through biomedicine [7][8][9], sensors [10,11], quantum information [12] and bionanotechnolgies [13]. In particular, a hybrid plasmonic nanoantenna has been suggested in [14] for the efficient enhancement of emission directionality and keeping high quantum efficiency.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence quenching in plasmonic dimers due to electron tunneling

Baghramyan¹,

Ciracì²

2021

Preprint

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Plasmonic nanoparticles provide an ideal environment for the enhancement of fluorescent emission. On the one hand, they locally amplify the electromagnetic fields, increasing the emitter excitation rate, and on the other hand, they provide a high local density of states that accelerates the spontaneous emission. However, when the emitter is placed in close proximity of the a single metal nanoparticles, the number of nonradiative states increases dramatically causing the fluorescence to quench. It has been predicted theoretically that, through a judicious placing of the emitter, flourescence in plasmonic nanocavities can be increased at will. In this article we show that such monotonic increase is due to the use of local response approximation in the description of the plasmonic response of metal nanoparticles. We demonstrate that taking into account the electron tunneling and the nonlocality of the surrounding system via the quantum hydrodynamic theory, results eventually in a quenching of fluorescence enhancement also when the emitter is placed in a nanocavity, as opposed to local response and Thomas-Fermi hydrodynamic theory results. This outcome marks the importance of considering the quantum effects, in particular, the electron tunneling to correctly describe the emission effects in plasmonic systems at nanoscale.

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Section: Introductionmentioning

confidence: 99%

Fluorescence quenching in plasmonic dimers due to electron tunneling

Baghramyan¹,

Ciracì²

2021

Preprint

View full text Add to dashboard Cite

show abstract

Fluorescence quenching in plasmonic dimers due to electron tunneling

Baghramyan

Ciracì

2022

Nanophotonics

View full text Add to dashboard Cite

Plasmonic nanoparticles provide an ideal environment for the enhancement of fluorescent emission. On the one hand, they locally amplify the electromagnetic fields, increasing the emitter excitation rate, and on the other hand, they provide a high local density of states that accelerates spontaneous emission. However, when the emitter is placed in close proximity to a single metal nanoparticle, the number of nonradiative states increases dramatically, causing the fluorescence to quench. It has been predicted theoretically that, through a judicious placing of the emitter, fluorescence in plasmonic nanocavities can be increased monotonically. In this article, we show that such monotonic increase is due to the use of local response approximation in the description of the plasmonic response of metal nanoparticles. We demonstrate that taking into account the electron tunneling and the nonlocality of the surrounding system via the quantum hydrodynamic theory results eventually in a quenching of fluorescence enhancement also when the emitter is placed in a nanocavity, as opposed to local response and Thomas–Fermi hydrodynamic theory results. This outcome marks the importance of considering the quantum effects, in particular, the electron tunneling to correctly describe the emission effects in plasmonic systems at nanoscale.

show abstract

Fluorescence and Raman Scattering in Plasmonic Nano-structures: From Basic Science to Applications

Cited by 2 publications

References 58 publications

Fluorescence quenching in plasmonic dimers due to electron tunneling

Fluorescence quenching in plasmonic dimers due to electron tunneling

Fluorescence quenching in plasmonic dimers due to electron tunneling

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