Journal of Nanoparticle Research

, Volume 3, Issue 1, pp 13–21

Ultrafast Relaxation Dynamics of the Optical Nonlinearity in Nanometric Gold Particles


DOI: 10.1023/A:1011463617132

Cite this article as:
Puech, K. & Blau, W. Journal of Nanoparticle Research (2001) 3: 13. doi:10.1023/A:1011463617132


Measurements of the resonantly enhanced, third-order nonlinear optical properties of gold nanostructures exhibiting reduced charge-carrier mobility in three dimensions were performed with a number of ultrafast nonlinear optical techniques. The size of the particles investigated was varied between 5 and 40 nm. The magnitude of the nonlinear susceptibility is of the order of 5·10−16 m2V−2 at resonance and an order of magnitude lower off-resonance. The response time of the nonlinearity is found to be extremely fast and could not be resolved in the experiments undertaken here. The only statement that can be made in this regard is that the phase relaxation time is of the order of or less than 20 fs while the energy relaxation time is of the order of or less than 75 fs.

nonlinear opticsultrafast processesnanoparticlesgoldquantum size effectsdielectric confinement

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  1. 1.Department of PhysicsTrinity CollegeDublin 2Ireland