Fluorescence of molecules placed near a spherical particle: Rabi splitting

Dvoynenko, Mykhaylo M.

doi:10.15407/spqeo20.04.458

Cited by 1 publication

(2 citation statements)

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“…A quantum emitter placed nearby a plasmonic structure shows a drastic change [1][2][3][4][5][6][7][8] in its radiation dynamic properties compared to its interaction with the vacuum fields. Such light-atom interactions are of particular interest for applications in quantum computation [9,10], biosensing [11,12], nanolasing [13] and active plasmonic devices [14].…”

Section: Introductionmentioning

confidence: 99%

“…Quantum emitters are characterized by strong evanescent fields that quickly decay away from their close proximity. The closer they are to a nanoplasmonic system, the more efficiently their fields can probe nonlocal and quantum effects in the metal response [1][2][3][4]. Recent studies have highlighted the impact of nonlocality on single-emitter weak coupling [53][54][55], as well as in plasmon-exciton systems in the strong coupling regime [56].…”

Section: Introductionmentioning

confidence: 99%

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Plasmonic quantum effects on single-emitter strong coupling

et al. 2019

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Coupling between electromagnetic cavity fields and fluorescent molecules or quantum emitters can be strongly enhanced by reducing the cavity mode volume. Plasmonic structures allow light confinement down to volumes that are only a few cubic nanometers. At such length scales, nonlocal and quantum tunneling effects are expected to influence the emitter interaction with the surface plasmon modes, which unavoidably requires going beyond classical models to accurately describe the electron response at the metal surface. In this context, the quantum hydrodynamic theory (QHT) has emerged as an efficient tool to probe nonlocal and quantum effects in metallic nanostructures. Here, we apply state-of-the-art QHT to investigate the quantum effects on strong coupling of a dipole emitter placed at nanometer distances from metallic particles. A comparison with conventional local response approximation (LRA) and Thomas-Fermi hydrodynamic theory results shows the importance of quantum effects on the plasmon-emitter coupling. The QHT predicts qualitative deviation from LRA in the weak coupling regime that leads to quantitative differences in the strong coupling regime. In nano-gap systems, the inclusion of quantum broadening leads to the existence of an optimal gap size for Rabi splitting that minimizes the requirements on the emitter oscillator strength.

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