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Dipolar and Quadrupolar Excitons Coupled to a Nanoparticle-on-a-Mirror Cavity
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Dipolar and Quadrupolar Excitons Coupled to a Nanoparticle-on-a-Mirror Cavity
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Paper
Dipolar and Quadrupolar Excitons Coupled to a Nanoparticle-on-a-Mirror Cavity
2019
Overview
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 light-matter 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.
Publisher
Cornell University Library, arXiv.org
