Nonlinear frequency conversion of light inside a microcavity

Abstract

Changing the color of light in a small mode volume is essential for applications that require on-chip operation.Microcavities are profound structures given their property to confine light in a small mode volume. Here, I numericallyinvestigate the frequency conversion of light in a microcavity and show that the frequency converted light intensity isdistinguished from an open medium such as an optical fiber or a nonlinear crystal. I observe that the frequency convertedlight intensity increases with increased rate of change of the refractive index of the microcavity. Notably, this study showsthat the intensity of the frequency converted light is maximized when the duration of the index perturbation is matchedto the cavity storage time. The results provide a set of optimum parameters for increasing frequency conversion efficiencyinside a microcavity.