The direct observation of the nature dynamics of the plexcition in the frequency domain by the Raman spectroscopy

The strong coupling enabled plexcitons between plasmons and excitons intrinsically produce distinguishable density of states (DOS) against the Rabi splitting. Taking advantage of this nature dynamic oscillation, we designed the plasmonic nano-cavity filling with monolayered MoS2 and otherwise probe the corresponding Raman scattering. Under the condition of the nearly 1:1 mismatching ratio, we directly observe the weakened Raman scattering, while performing the exciton damping decay, and conversely, the enhanced Raman signal inside the enriched confinement of E-field. We believe, our work provide the deeper understanding of the sensing technology within the strong coupling system, it could highlight the altered nano-device, e.g. the high-speed sensing switch and so on, in the room temperature.