Dielectric Nanoantennas for Versatile Light Control

We apply silicon nanoparticles to achieve directional light scattering, directional emission of two-dimensional transition metal dichalcogenides (2D TMDs), and room-temperature near-intrinsic exciton linewidth in 2D TMDs. Hydrogenated amorphous and core-shell nanoparticles are synthesized to suppress optical loss and enable broadband directional scattering. A modified Mie theory for dipole-sphere hybrid systems is developed, along with numerical simulations, to instruct the optimal antenna design. We extend the theory to study a chiral emitter coupled with a silicon nanosphere