Exciton–polaritons in GaAs-based slab waveguide photonic crystals
Exciton–polaritons in GaAs-based slab waveguide photonic crystals
We report the observation of band gaps for low loss exciton-polaritons propagating outside the light cone in GaAs-based planar waveguides patterned into two-dimensional photonic crystals. By etching square lattice arrays of shallow holes into the uppermost layer of our structure, we open gaps on the order of 10 meV in …