Purcell effect observation in erbium doped lithium niobate photonic crystal structures

In this study, we investigate the emission from a photonic crystal (PC) structure fabricated in Er-doped LiNbO3 crystal. We report the linear, non-linear, and saturated output intensity as the pumping power is increased. The measurements are taken inside the PC and on the bulk substrate. Purcell effect can be observed in the experimental results in the presence of the PC.