Enhanced Excited-State Optical Nonlinearities in a Novel Metallophthalocyanine Compound (C12H25O)8PcPb
QU Shi-Liang1, CHEN Yu2, SONG Ying-Lin1, WANG Yu-Xiao1, ZHAO Xiu-Li1, LIU Shu-Tian1, WANG Duo-Yuan2
1Department of Physics, Harbin Institute of Technology, Harbin 150001
2Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
Enhanced Excited-State Optical Nonlinearities in a Novel Metallophthalocyanine Compound (C12H25O)8PcPb
1Department of Physics, Harbin Institute of Technology, Harbin 150001
2Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080
Abstract： Nonlinear absorption in a novel metallophthalocynine compound
(C12H25O)8PcPb was investigated by Z-scan technique with the irradiation of 8 ns laser pulses at the wavelength of 532 nm. The large optical limiting response was observed. The nonlinear absorption cross section was obtained by the simulation with a simplified rate equation model in which excited triplet-triplet states absorption is dominant. The excited-state absorption cross section and its effective ratio to the ground-state absorption cross section are larger than those of C60. The attenuation factor for (C12H25O)8PcPb is 2.5 times larger than that of C60, which is induced by the heavy atom lead interposition.
2001, Vol. 18 
