Light-Matter Interplay in the Exciton-Photon Hybrid Configurations in the Flatland*

Manipulating the interplay between matter and photonic structure unravel abundant possibilities in the fundamental understandings and practical applications, namely the surface-enhanced Raman spectroscopy and nanolaser. In this presentation, I will first show our new understanding of the Fano-type asymmetry deviated from the Rabi-type asymmetry in the exciton-plasmon hybrid system, which is experimentally confirmed with two-dimensional (2D) layered WSe₂ coupled to plasmonic lattice. To overcome the large Ohmic loss of plasmonic material, in the second project we apply the chemical vapor deposition (CVD) bottom-up method to fabricate the metaphotonic structure based on the bulk transition metal dichalcogenides (TMDCs). More specifically, we realize the magnetic-type surface lattice resonance (M-SLR) in the one-dimensional (1D) MoS₂ metaphotonic structure with extremely low material loss. Bright Mie modes and self-coupled anapole-exciton polaritons with unambiguous anti-crossing behavior are also realized in 2D MoS₂ metaphotonic structures. However, the aforementioned TMDCs structure does not demosntrate photoluminescence properties. By combining the multilayer (ML) TMDCs to the designed TMDCs metaphotonic structures, we are able to manipulate the polarization and direction of the photoluminescence from the ML TMDCs. Moreover, the valley degree of freedom of monolayer TMDCs will possibly result in abundant new physical phenomena when they are coupled to the chiral TMDCs structures.