Interaction and Coherence of a Plasmon–Exciton Polariton Condensate

Giorgi, Milena De; Ramezani, Mohammad; Todisco, Francesco; Halpin, Alexei; Caputo, Davide; Fieramosca, Antonio; Gómez-Rivas, Jaime; Sanvitto, D.

doi:10.1021/acsphotonics.8b00662

Cited by 44 publications

(53 citation statements)

References 45 publications

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“…Strong field enhancement at the regions far from the nanoparticles is one of the most prominent characteristics of SLRs and can be used to improve and coherently control light absorption [20,21], enhance emission [22][23][24][25][26][27][28][29], increase nonlinearities [30,31], and enhance the spatial coherence [32,33]. Another characteristic is their very narrow linewidths arising from the reduction of radiation and Ohmic losses [14,34,35,36], which can be exploited for the improvement of the sensitivity of plasmonic sensors [37][38][39], or to achieve band edge lasing [40][41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Strong light–matter coupling and exciton-polariton condensation in lattices of plasmonic nanoparticles [Invited]

2019

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Section: Introductionmentioning

confidence: 99%

Strong light–matter coupling and exciton-polariton condensation in lattices of plasmonic nanoparticles [Invited]

2019

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“…The SLR modes couple to the absorption line of emitters, for example organic dye molecules, and reach the strong coupling regime as evidenced by the square root dependence of the Rabi splitting on the emitter concentration as reported by Väkeväinen et al [13]. Strong coupling in such arrays has already led to new coherence, lasing and condensation phenomena [4,5,14,15].…”

Section: Introductionmentioning

confidence: 98%

Strong coupling between organic dye molecules and lattice modes of a dielectric nanoparticle array

et al. 2019

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Plasmonic structures interacting with light provide electromagnetic resonances which result in a high degree of local field confinement enabling the enhancement of light-matter interaction. Plasmonic structures typically consist of metals which, however, suffer from very high ohmic losses and heating. High-index dielectrics, on the other hand, can serve as an alternative material due to their low-dissipative nature and strong scattering abilities. We study the optical properties of a system composed of all-dielectric nanoparticle arrays covered with a film of organic dye molecules (IR-792), and compare these dielectric arrays with metallic nanoparticle arrays. We tune the light-matter interaction by changing the concentration in the dye film and report the system to be in the strong coupling regime. We observe a Rabi splitting between the surface lattice resonances (SLRs) of the nanoparticle arrays and the absorption line of the dye molecules of up to 253 meV and 293 meV, for the dielectric and metallic nanoparticles, respectively. The Rabi splitting depends linearly on the square root of the dye molecule concentration , and we further assess how the Rabi splitting depends on the film thickness for a low dye molecule concentration. For thinner films of thicknesses up to 260 nm, we observe no visible Rabi splitting. However, a Rabi splitting evolves at thicknesses from 540 nm to 990 nm. We perform finite-difference time-domain simulations to analyze the near-field enhancements for the dielectric and metallic nanoparticle arrays. The electric fields are enhanced by a factor of 1200 and 400, close to the particles for gold and amorphous silicon, respectively, and the modes extend over half a micron around the particles for both materials.

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“…For this reason, plasmonic resonators perform as nanocavities for quantum optical applications [12]. Importantly, despite of their low quality factor (caused by metal absorption), the small effective volume of SPs give access to an unexplored parametric region of light-matter coupling, not accessible by other photonic technologies [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Dipolar and quadrupolar excitons coupled to a nanoparticle-on-mirror cavity

Cuartero-González

Fernández‐Domínguez

2020

Phys. Rev. B

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We investigate plasmon-emitter interactions in a nanoparticle-on-a-mirror cavity. We consider two different sorts of emitters, those that sustain dipolar transitions, and those hosting only quadrupolar, dipole-inactive, excitons. By means of a fully analytical two-dimensional transformation optics approach, we calculate the lightmatter coupling strengths for the full plasmonic spectrum supported by the nanocavity. We reveal the impact of finite-size effects in the exciton charge distribution and describe the population dynamics in a spontaneous emission configuration. Pushing our model beyond the quasi-static approximation, we extract the plasmonic dipole moments, which enables us to calculate the far-field scattering spectrum of the hybrid plasmon-emitter system. Our findings, tested against fully numerical simulations, reveal the similarities and differences between the strong coupling phenomenology for bright and dark excitons in nanocavities.

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Interaction and Coherence of a Plasmon–Exciton Polariton Condensate

Cited by 44 publications

References 45 publications

Strong light–matter coupling and exciton-polariton condensation in lattices of plasmonic nanoparticles [Invited]

Strong light–matter coupling and exciton-polariton condensation in lattices of plasmonic nanoparticles [Invited]

Strong coupling between organic dye molecules and lattice modes of a dielectric nanoparticle array

Dipolar and quadrupolar excitons coupled to a nanoparticle-on-mirror cavity

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