Nonlinear optical characteristics of C 60 and C 70 ®lms and solutions

NPO Akadempribor, Academy of Sciences of Uzbekistan, Tashkent 700143, Uzbekistan; Samarkand State University, Samarkand 703004, Uzbekistan
Optics Communications (Impact Factor: 1.44). 01/2000; DOI: 10.1016/S0030-4018(00)01025-7

ABSTRACT Investigations of nonlinear optical parameters of C 60 and C 70 ®lms and solutions by Z-scan method are presented. Nonlinear refractive indices on the wavelength of Nd:YAG laser radiation (k ˆ 1064 nm) have been measured. Two-photon absorption and nonlinear susceptibilities of fullerene-doped ®lms and solutions have been studied. Ó 2000 Published by Elsevier Science B.V.

  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The primary focus of this program was to synthesize pi-conjugated oligomers that feature high cross section two-photon absorbing (TPA) chromophores combined with transition metal centers. The TPA chromophores imbue the oligomers with high cross sections for two-photon absorption, whereas the metal centers provide for efficient production of long-lifetime, strongly absorbing triplet excited states. Because of the strong absorption of the triplet excited states, the materials display reverse saturable absorption (RSA). The second generation organometallic materials provide efficient, broad wavelength and broad temporal response nonlinear absorption via a dual mode TPA/RSA mechanism.
  • [Show abstract] [Hide abstract]
    ABSTRACT: Dynamic nonlinearities of C70/toluene solution are measured and analysed by an improved picosecond time-resolved pump-probe system based on a nonlinear imaging technique with phase object. The photophysical parameters are determined by the five-level model, which is adopted to interpret the experimental data. The change of refraction index per unit density of the excited state obtained by a numerically simulation is a critical factor to determine the nonlinear behaviour of C70 in picosecond time regime.
    Chinese Physics B 01/2011; 20(1):013103. · 1.15 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: Surface-enhanced Raman scattering (SERS) spectrum of C60 was obtained on Fe3O4 and Au nanoparticles co-modified substrate. The number of vibrational modes was greatly increased, especially some modes that were forbidden in Raman spectrum, appeared and even split as prediction of group theory. By introducing Fe3O4 magnetic nanoparticles, this co-modified substrate shows high SERS activity which is superior to bare Au nanoparticles modified substrate. Experimental results indicate that the co-modified substrate is very effective and active. It provides convenience for probing the C60 molecule’s vibrational structure, the physical properties and the adsorption behavior with high sensitivity, as well as the interaction of adsorbed molecules with substrate.
    Chemical Physics 06/2010; 372(s 1–3):1–5. · 1.96 Impact Factor


Available from
May 22, 2014