Exciton–Plasmon Coupling Enhancement <i>via</i> Metal Oxidation

Todisco, Francesco; D’Agostino, Stefania; Esposito, Marco; Fernández‐Domínguez, Antonio I.; Giorgi, Milena De; Ballarini, Dario; Dominici, Lorenzo; Tarantini, Iolena; Cuscunà, Massimo; Sala, Fabio Della; Gigli, Giuseppe; Sanvitto, D.

doi:10.1021/acsnano.5b04974

Cited by 40 publications

(40 citation statements)

References 68 publications

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“…analogously to Eqs. (21) and (35). One can also introduce the far-field amplitude F rad of the total field by replacing E sca , F, P, and W sca in Eqs.…”

Section: Energy Budget For Sources Near a Scatterermentioning

confidence: 99%

“…Unfortunately, W enh cannot be directly simplified analogously to Eqs. (21) and (35) due to the lack of symmetry between the two vector functions on the left and right sides ofḠ. However, combining it with W ext [Eq.…”

Section: Energy Budget For Sources Near a Scatterermentioning

confidence: 99%

“…On one hand, the DDA has been successfully applied to all types of emission enhancementfluorescence [18,19], SERS [20], and EELS [13,14]. On the other hand, those applications suffer from incomplete understanding of the energy budget described above, complicating their generalizations to complex environments, although see [21,22] for the first steps. Moreover, there exists a controversy about the use of the optical theorem to quantify the accuracy of a particular DDA simulation, suggested in [23] but later criticized in [18].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Energy budget and optical theorem for scattering of source-induced fields

Moskalensky

Yurkin

2019

Phys. Rev. A

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We provide rigorous definitions of various components of the energy budget for scattering of source-induced electromagnetic fields by a finite nonmagnetic object. We use the classical volume-integral-equation (VIE) framework and define power rates in terms of integrals of the Poynting vector over various surfaces, enclosing some or all of the impressed sources, scatterer, and environment (such as a planar multilayered substrate). Thus, we generalize the conventional cross sections and obtain new interrelations analogous to the well-known optical theorem. We rigorously treat the strong singularity of the VIE kernel, but keep derivations accessible to a wide audience. The defined power rates are further related to the decay rate enhancement and apparent quantum yield of an arbitrary emitter, which are the core concepts in nanophotonics, surface-enhanced Raman scattering, and electron energy-loss spectroscopy. We also discuss the practical calculation of the power rates and decay rate enhancements in the framework of the discrete dipole approximation (DDA). In particular, we derive the volume-integral expression for the scattered power and use it to prove the automatic satisfaction of the optical theorem irrespective of the discretization level. Thus, the optical theorem cannot be used as an internal measure of the DDA accuracy.

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“…analogously to Eqs. (21) and (35). One can also introduce the far-field amplitude F rad of the total field by replacing E sca , F, P, and W sca in Eqs.…”

Section: Energy Budget For Sources Near a Scatterermentioning

confidence: 99%

Section: Energy Budget For Sources Near a Scatterermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Energy budget and optical theorem for scattering of source-induced fields

Moskalensky

Yurkin

2019

Phys. Rev. A

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“…From the experimental side, in recent years, PEPs have been reported in emitter ensembles [10][11][12][13], in which excitonic nonlinearities are negligible [14][15][16]. Only very recently, thanks to advances in the fabrication and characterization of large Purcell enhancement nanocavities [17][18][19], far-field signatures of plasmonexciton strong coupling for single molecules have been reported experimentally [20].…”

mentioning

confidence: 99%

Transformation Optics Approach to Plasmon-Exciton Strong Coupling in Nanocavities

et al. 2016

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We investigate the conditions yielding plasmon-exciton strong coupling at the single emitter level in the gap between two metal nanoparticles. A quasi-analytical transformation optics approach is developed that makes possible a thorough exploration of this hybrid system incorporating the full richness of its plasmonic spectrum. This allows us to reveal that by placing the emitter away from the cavity center, its coupling to multipolar dark modes of both even and odd parity increases remarkably. This way, reversible dynamics in the population of the quantum emitter takes place in feasible implementations of this archetypal nanocavity.PACS numbers: 73.20. Mf, 42.50.Nn, 71.36.+c Plasmon-exciton-polaritons (PEPs) are hybrid lightmatter states that emerge from the electromagnetic (EM) interaction between surface plasmons (SPs) and nearby quantum emitters (QEs) [1,2]. Crucially, PEPs only exist when these two subsystems are strongly coupled, i.e., they exchange EM energy coherently in a time scale much shorter than their characteristic lifetimes. Recently, much attention has focused on PEPs, since they combine the exceptional light concentration ability of SPs with the extreme optical nonlinearity of QEs. These two attributes makes them promising platforms for the next generation of quantum nanophotonic components [3].A quantum electrodynamics description of plasmonic strong coupling of a single QE has been developed for a flat metal surface [4], and isolated [5,6] and distant nanoparticles [7][8][9], where SP hybridization is not fully exploited. From the experimental side, in recent years, PEPs have been reported in emitter ensembles [10][11][12][13], in which excitonic nonlinearities are negligible [14][15][16]. Only very recently, thanks to advances in the fabrication and characterization of large Purcell enhancement nanocavities [17][18][19], far-field signatures of plasmonexciton strong coupling for single molecules have been reported experimentally [20].In this Letter, we theoretically investigate the plasmonic coupling of a single emitter in a paradigmatic cavity: the nanometric gap between two metallic particles [13,19,20]. We consider spherical-shaped nanoparticles, and develop a transformation optics (TO) [21,22] approach that fully accounts for the rich EM spectrum that originates from SP hybridization across the gap. Our method, which is the first application of TO concepts to treat quantum optical phenomena, yields quasianalytical insight into the Wigner-Weisskopf problem [23] for these systems, and enables us to reveal the prescriptions that nanocavities must fulfil to support single QE PEPs. (1) level system (with transition frequency ω E and z-oriented arXiv:1605.09443v2 [cond-mat.mes-hall]

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“…Recent studies have shown that strong coupling can be introduced to modify molecular system physicochemical characteristics . Strong coupling between the ground and excited states can modulate photochemical properties, work functions, and phase transitions. Cavity–vibration strong coupling can regulate specific chemical bond vibrational frequencies within a molecule .…”

Section: Strong Coupling Practical Applicationsmentioning

confidence: 99%

Strong Coupling in Microcavity Structures: Principle, Design, and Practical Application

Yua

et al. 2018

Laser & Photonics Reviews

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When interaction between light and matter is in the strong coupling region, matter has a significant influence on the whole system, with potential to develop low-power active optical devices. Strong coupling can verify some basic problems of quantum physics, and it is an ideal system to study light-matter interaction, providing an intuitive and accurate demonstration of some pure quantum effects with small mass and easy optical control. Here, the most important advances in strong coupling in recent years are described. Of late, an extensive series of experimental and theoretical findings, and remarkable achievements have been made in this field. Strong coupling between cavities and some new materials such as semiconductors, two-dimensional (2D) material, and quantum dots (QDs) are the focus of research in this field. Another field that has made outstanding progress is the application of this optical phenomenon, including resonance-enhanced Raman and infrared spectra, nanolasers, and cavity-enhanced sensing. Furthermore, the potential in this field arises for future quantum information and quantum optical devices. It is now developing at a very fast rate and can be predicted to have broad prospects for development in the future. Some prospects in terms of design and application are included.

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Exciton–Plasmon Coupling Enhancement via Metal Oxidation

Cited by 40 publications

References 68 publications

Energy budget and optical theorem for scattering of source-induced fields

Energy budget and optical theorem for scattering of source-induced fields

Transformation Optics Approach to Plasmon-Exciton Strong Coupling in Nanocavities

Strong Coupling in Microcavity Structures: Principle, Design, and Practical Application

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