Plexcitons: Dirac points and topological modes

Abstract

Plexcitons are polaritonic modes that result from the strong coupling between excitons and plasmons. We consider plexcitons emerging from the interaction of excitons in an organic molecular layer with surface plasmons in a metallic film. We predict the emergence of Dirac cones in the two-dimensional bandstructure of plexcitons due to the inherent alignment of the excitonic transitions in the organic layer. These Dirac cones may open up in energy by simultaneously interfacing the metal with a magneto-optical layer and subjecting the whole system to a perpendicular magnetic field. The resulting energy gap becomes populated with topologically protected one-way modes which travel at the interface of this plexcitonic system. Our theoretical proposal suggests that plexcitons are a convenient and simple platform for the exploration of exotic phases of matter as well as of novel ways to direct energy flow at the nanoscale.

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• Absorption and Photoluminescence in Organic Cavity QED
• Theory of Nanoscale Organic Cavities: The Essential Role of Vibration-Photon Dressed States
• Can ultrastrong coupling change ground state chemical reactions?
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• Manipulating type-I and type-II Dirac polaritons in cavity-embedded honeycomb metasurfaces
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• Exciton-Polaritons in Uniaxially Aligned Organic Microcavities
• Light-induced topological magnons in two-dimensional van der Waals magnets
• Non-Hermitian Hamiltonians for Linear and Nonlinear Optical Response: a Model for Plexcitons
• Interfacial anisotropic exciton-polariton manifolds in ReS${}_2$
• Chiral Topological Excitons in a Chern Band Insulator
• Vibration-assisted exciton transfer in molecular aggregates strongly coupled to confined light fields
• Disordered ensembles of strongly coupled single-molecule plasmonic picocavities as nonlinear optical metamaterials
• Precise determination of excitation energies in condensed-phase molecular systems based on exciton-polariton measurements
• The Role of Molecular Arrangement on the Dispersion in Strongly Coupled Metal-Organic Hybrid Structures
• Multiple polaritonic edge states in a Su-Schrieffer-Heeger chain strongly coupled to a multimode cavity
• Molecular and solid-state topological polaritons induced by population imbalance
• Anisotropic Photo-Physical Properties of Plexcitons in Strongly Coupled Metal-Organic Thin Films
• Resonant laser excitation and time-domain imaging of chiral topological polariton edge states
• Zero-Threshold PT-Symmetric Polariton-Raman Laser
• Anisotropic exciton-polaritons reveal non-Hermitian topology in van der Waals materials
• Excitation of surface plexciton wave at interface of a metal and a columnar thin film infiltrated with J-aggregate dyes
• Theory of exciton transport in molecular crystals strongly coupled to a cavity: A temperature-dependent variational approach
• Resonant Energy Transfer Under the Influence of the Evanescent Field from the Metal
• Mirror-induced effects in cavity polaritonics: Influence on edge states
• Controlling the nonadiabatic electron-transfer reaction rate through molecular-vibration polaritons in the ultrastrong coupling regime
• Topological transitions induced by cavity-mediated interactions in photonic valley-Hall metasurfaces