Nonlinear Optical Radiation of a Lithium Niobate Microcavity
Nonlinear Optical Radiation of a Lithium Niobate Microcavity
The nonlinear coupling between on-chip confined optical modes and free-space continuum modes is investigated. The radiation of second-harmonic wave due to the pump fields in integrated lithium niobate microcavities is experimentally observed. The mechanism of nonlinear optical radiation (NOR) is further verified by demonstrating the reversal process of NOR, i.e., …