Third-order nonlinear optical properties of 2-adamantylamino-5-nitropyridine caused by cascaded second-order nonlinearity

Abstract 2-Adamantylamino-5-nitropyridine (AANP) was reported to have large nonlinear optical properties d 31 of 80 pm/V and have an ability of type II phase-matching by using d 15 . The χ (2) : χ (2) cascading effect via second-order optical nonlinearity produces the same effect of the third-order optical nonlinearity in phase-matching condition. We investigated the third-order nonlinear optical properties via cascaded second-order optical nonlinearity of AANP crystal at telecommunication wavelength range.