Acta Optica Sinica, Volume. 17, Issue 6, 687(1997)
Photopolymerization of C60 Films in Ultrahigh Vacuum Observed by Second Harmonic Generation
Using 1.064 μm wavelength laser pulses, the photopolymerization of C 60 films on a polycrystalline Ag surface under ultrahigh vacuum (UHV) environment is investigated by optical second harmonic generation (SHG) method. It is found that the intensity of the SHG signals from C 60 films increases with the extension of exposure time under ultraviolet light, and finally reaches to a saturation value. We suggested that the enhanced second harmonic generation from photochemically modified C 60 films is induced by the reinforce of bulk electric quadrupole polarization and magnetic dipole.
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[in Chinese], [in Chinese], [in Chinese]. Photopolymerization of C60 Films in Ultrahigh Vacuum Observed by Second Harmonic Generation[J]. Acta Optica Sinica, 1997, 17(6): 687