MEASUREMENT OF THE C-60 MOLECULAR POLARIZABILITY OF THE EXCITED SINGLET-STATE USING Z-SCAN

We report on a method of determining the C-60 molecular polarizability alpha(e) of the excited singlet state under 23 picosecond excitation at 532 nm using the Z-scan technique. Based on the Clausius-Mossotti e quation, the sign and the magnitude of the real part and the imaginary part of alpha(e) are respectively measured to be 1.2 X 10(-22) and 7. 2 X 10(-23) esu. We also obtain the nonlinear refractive cross section sigma(r) of 4.2 X 10(-17) cm(2). (C) 1998 Elsevier Science B.V.