Cavity-enhanced second harmonic generation from Rydberg excitons in Cu${}_2$O

Horatio Q. X Wong, Krzysztof Sawicki, Madeleine Fisher +6

Rydberg excitons in Cu${}_2$O provide a solid-state setting for creating giant optical nonlinearities. Here, we use second-harmonic generation (SHG) to study Rydberg excitons in a do…