Single-molecule strong optomechanical regimes in SERS via hybrid plasmonic cavities

Abstract:We identify enhanced strong coherent Surface-Enhanced Raman Scattering (SERS) interactions facilitated by hybridized metallo-dielectric cavities with a resonant fluorescent molecule. By illuminating a detuned electronic transition near saturation via a narrowband hybrid plasmonic mode, we observe enhanced splittings in the Stokes and anti-Stokes spectra, revealing strong optomechanical coupling and nonlinear vibrational modifications at intensities far below irreversible SERS damage thresholds. We compute the second-order photon correlations that allows identifying the nonclassical character associated to these strong optomechanical interactions and SERS configurations that enables them to optically characterize the anharmonic character of the vibrational modes.

Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Optics (physics.optics)

arXiv:2608.03307 [quant-ph]

(or arXiv:2608.03307v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2608.03307 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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