Author/Authors :
Arandi G. Bezerra Jr، نويسنده , , A.G. and Borissevitch، نويسنده , , I.E. and de Araujo، نويسنده , , R.E. and Gomes، نويسنده , , A.S.L and de Araْjo، نويسنده , , Cid B.، نويسنده ,
Abstract :
Porphyrin metal complex derivatives were experimentally studied using the Z-scan technique and the optical Kerr gate method with picosecond pulses at 532 nm. The sign and magnitude of the nonlinear refraction and nonlinear absorption were determined for a negatively charged meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS4) and a positively charged meso-tetrakis(4-N-methyl-pyridiniumyl)porphyrin (TMPyP) in their free-base forms and their Fe(III) and Mn(III) complexes. The results were phenomenologically understood and the origin of the nonlinearity was inferred.
