Room Temperature Exciton-Polariton Condensation in Silicon Metasurfaces Emerging from Bound States in the Continuum

Abstract

We show the first experimental demonstration of room-temperature exciton-polariton (EP) condensation from a bound state in the continuum (BIC). This demonstration is achieved by strongly coupling stable excitons in an organic perylene dye with the extremely long-lived BIC in a dielectric metasurface of silicon nanoparticles. The long lifetime of the BIC, mainly due to the suppression of radiation leakage, allows for EP thermalization to the ground state before decaying. This property results in a condensation threshold of less than 5 μJ cm^{-2}, one order of magnitude lower that the lasing threshold reported in similar systems in the weak coupling limit.

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Cited by in corpus (5)

• High topological charge lasing in quasicrystals
• Inverse Design of All-dielectric Metasurfaces with Bound States in the Continuum
• Robustness of Bound States in the Continuum in Bilayer Structures against Symmetry Breaking
• Topological invariants and topological charges in photonic systems
• Modelling Purcell enhancement of metasurfaces supporting quasi-bound states in the continuum