Fig. 13

Strong coupling between nanoparticle-on-a-mirror and transition metal dichalcogenides. NPoM coupled to the a WSe₂ monolayer and b multilayer and the corresponding scattering spectrum. c Simulated field distributions for different plasmon-coupled mode. d Schematic of measuring DF scattering signals of individual nanoparticles. e Scattering spectra of the hybrids with varying sizes of AgNC. f Dispersion of polaritons as a function of detuning. g Schematics with optical microscopy and SEM images of WS₂ monolayer deposited on Au mirror, nanogap resonators, and strongly coupled system. h Absorption spectrum and scattering spectrum of each structure in g. i Scattering spectra of nanogap resonator with WS₂. j Coupling strength as a function of exciton number. Reproduced with permissions from [98, 100, 103], respectively