C_(60)-benzene solutions are used as a new type of nonlinear Medium for observing cw self-focusing of laser beams.Self-phase modulation of much low power laser beam has been observed.The response time of C_(60)-benzen...C_(60)-benzene solutions are used as a new type of nonlinear Medium for observing cw self-focusing of laser beams.Self-phase modulation of much low power laser beam has been observed.The response time of C_(60)-benzene solution has been measured.展开更多
Photoacoustic spectroscopy of C60 thin film is presented.The optical band edge of solid C60 and the optical absorption coefficient at absorption edge are determined.A weak absorption shoulder at 1.70eV is observed.Whi...Photoacoustic spectroscopy of C60 thin film is presented.The optical band edge of solid C60 and the optical absorption coefficient at absorption edge are determined.A weak absorption shoulder at 1.70eV is observed.While the thickness of C60 thin film is less than 1μm,photoacoustic saturation at band edge is avoided.展开更多
We report the experimental observation of electric field induced Gso redistribution,in benzene solution by thermal blooming change of transmitted light.The pol&riz&tion of C_(60) molecules in external field is...We report the experimental observation of electric field induced Gso redistribution,in benzene solution by thermal blooming change of transmitted light.The pol&riz&tion of C_(60) molecules in external field is analyzed.展开更多
We present nieasureinents of two-pho ton absorption(TPA)coefficient of C_(60) thin Hhn at 633nm.Large values of β〜5cm/W were determined.Nearly~resona.nt TPA transition around 3.76eV absorption region was discussed.
The degradation of C_(60) in organic solution by light has been reported by Taylor et al.[Nature,351(1991)277].The powders of the mixture of C_(60) and C_(70) prepared by arc heating ofgraphite electrodes in the envir...The degradation of C_(60) in organic solution by light has been reported by Taylor et al.[Nature,351(1991)277].The powders of the mixture of C_(60) and C_(70) prepared by arc heating ofgraphite electrodes in the environment of He gas was not to be stable with respect to intense irradiation of argon laser(488.0nm),as monitored by Raman spectrascopy,C_(70) is found to be first decomposed into fragmentary graphite,then C_(60) followed suit.It is interesting to note that besides graphite,some traces of diamond-like structure are shown confirming some speculations of Mackay[Nature,352(1991)762].展开更多
Raman spectra during the transformation from fullerite to amorphous carbon are analyzed.The transformation temperature is obtained from intensity ratio of Stokes and anti-Stokes lines by using Placzek’s formula.The t...Raman spectra during the transformation from fullerite to amorphous carbon are analyzed.The transformation temperature is obtained from intensity ratio of Stokes and anti-Stokes lines by using Placzek’s formula.The temperature,less than 2.0 x103K,is in consistence with previous work.展开更多
基金Supported by the National Natural Science Foundation of China.
文摘C_(60)-benzene solutions are used as a new type of nonlinear Medium for observing cw self-focusing of laser beams.Self-phase modulation of much low power laser beam has been observed.The response time of C_(60)-benzene solution has been measured.
基金the National Natural Science Foundation of China,and MAC of Nanjing University.
文摘Photoacoustic spectroscopy of C60 thin film is presented.The optical band edge of solid C60 and the optical absorption coefficient at absorption edge are determined.A weak absorption shoulder at 1.70eV is observed.While the thickness of C60 thin film is less than 1μm,photoacoustic saturation at band edge is avoided.
基金Supported by the National Natural Science Foundation of China.
文摘We report the experimental observation of electric field induced Gso redistribution,in benzene solution by thermal blooming change of transmitted light.The pol&riz&tion of C_(60) molecules in external field is analyzed.
基金Supported by the National Natural Science Foundation of China。
文摘We present nieasureinents of two-pho ton absorption(TPA)coefficient of C_(60) thin Hhn at 633nm.Large values of β〜5cm/W were determined.Nearly~resona.nt TPA transition around 3.76eV absorption region was discussed.
基金Supported by the National Ph.D.Foundation of Chinathe Center of Materials Analysis,No.1991-1992.
文摘The degradation of C_(60) in organic solution by light has been reported by Taylor et al.[Nature,351(1991)277].The powders of the mixture of C_(60) and C_(70) prepared by arc heating ofgraphite electrodes in the environment of He gas was not to be stable with respect to intense irradiation of argon laser(488.0nm),as monitored by Raman spectrascopy,C_(70) is found to be first decomposed into fragmentary graphite,then C_(60) followed suit.It is interesting to note that besides graphite,some traces of diamond-like structure are shown confirming some speculations of Mackay[Nature,352(1991)762].
文摘Raman spectra during the transformation from fullerite to amorphous carbon are analyzed.The transformation temperature is obtained from intensity ratio of Stokes and anti-Stokes lines by using Placzek’s formula.The temperature,less than 2.0 x103K,is in consistence with previous work.
