Bright two-photon luminescence of gold and silver nanoparticles photodeposited in titanium dioxide matrix was studied
under near IR laser pulse irradiation. Electromagnetic field enhancement coefficients were estimated for the most intense
hot spots at wavelength of excitation. The estimation was compared with theoretical predictions of FDTD analysis.
Vibrational wave packets in chloroform and gold colloid in chloroform were studied by femtosecond pump-probe
spectroscopy. It was found that the main modes of oscillations for both systems coincide with the frequencies of the
Raman resonances of chloroform 260 cm-1, 367 cm-1 and 668 cm-1. The effect of gold nanoparticles leads to 4-6 fold
increased signal of Raman resonance of pure chloroform.
Field enhancement coefficient was calculated for silver and palladium clusters photodeposited on titan dioxide
nanoparticle. It was shown that experimental fluorescence enhancement can qualitatively be explained by plasmon
resonance and nanosystem geometry.