Nonlinear excited state absorption in cadmium texaphyrin solution

摘要: Nonlinear absorption at 532 nm in a cadmium texaphyrin solution has been studied using 8 ns and 23 ps laser pulses. The experiments show that reverse saturable occurs the nanosecond case. For picosecond pulses, only low fluences, transmission increases with increasing incident fluence high fluences. A six‐level model is presented to explain these nonlinear effects. Several photophysical parameters for texaphyrin, such as cross sections lifetimes, have evaluated by theoretical simulations of experimental results.