HARMONIC-GENERATION SPECTROSCOPY OF BORON SUBPHTHALOCYANINE

The dispersive behavior of the magnitude and phase of chi(3)(-3 omega: omega,omega,omega,) of sublimated baron subphthalocyanine (SubPc) thi n films has been investigated via third harmonic generation (THG) spec troscopy in the range 950-2000 nm. chi(3) values, three times bigger t han those obtained for phthalocyanines in the same frequency range, ha ve been measured. A four-level model, including the ground state and t hree excited states associated to bands observed in the linear absorpt ion spectrum, has been successfully used to explain the nonlinear beha vior of these compounds.