Nonlinear absorption in a novel metallophthalocynine compound (C_(12)H_(25)O)_(8)PcPb was investigated by the Zscan technique with the irradiation of 8ns laser pulses at the wavelength of 532nm. The large optical limi...Nonlinear absorption in a novel metallophthalocynine compound (C_(12)H_(25)O)_(8)PcPb was investigated by the Zscan technique with the irradiation of 8ns laser pulses at the wavelength of 532nm. 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 state 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 C_(60). The attenuation factor for (C_(12)H_(25)O)_(8)PcPb is 2.5 times larger than that of C_(60), which is induced by the heavy atom lead interposition.展开更多
Large two-photon absorption cross section of a novel compound trans-1,3,5-tri-(4-N,N-dimethylaminobenzylstyryl)-acetylacetone is measured to beσ_(2)=8.4×10^(-20)cm^(4)/GW orσ'_(2)=1.594×10^(-47)cm^(4)/...Large two-photon absorption cross section of a novel compound trans-1,3,5-tri-(4-N,N-dimethylaminobenzylstyryl)-acetylacetone is measured to beσ_(2)=8.4×10^(-20)cm^(4)/GW orσ'_(2)=1.594×10^(-47)cm^(4)/(photon.s)by using a 1064 nm Nd:YAG laser with 35 ps pulse width based on the intensity-dependent transmissivity measurement.The frequency upconversion fluorescence is observed by two-photon laser pumping.This material is an ideal candidate for optical limiting and upconversion fluorescence.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.292682001 and 29832030。
文摘Nonlinear absorption in a novel metallophthalocynine compound (C_(12)H_(25)O)_(8)PcPb was investigated by the Zscan technique with the irradiation of 8ns laser pulses at the wavelength of 532nm. 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 state 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 C_(60). The attenuation factor for (C_(12)H_(25)O)_(8)PcPb is 2.5 times larger than that of C_(60), which is induced by the heavy atom lead interposition.
基金Supported by the National Natural Science Foundation of China under Grant Nos.29832030 and 20072039the Foundation of Laboratory of Optical Physics at the Institute of Physics,Chinese Academy of Sciences.
文摘Large two-photon absorption cross section of a novel compound trans-1,3,5-tri-(4-N,N-dimethylaminobenzylstyryl)-acetylacetone is measured to beσ_(2)=8.4×10^(-20)cm^(4)/GW orσ'_(2)=1.594×10^(-47)cm^(4)/(photon.s)by using a 1064 nm Nd:YAG laser with 35 ps pulse width based on the intensity-dependent transmissivity measurement.The frequency upconversion fluorescence is observed by two-photon laser pumping.This material is an ideal candidate for optical limiting and upconversion fluorescence.
