Pump-probe experiments at 1064 nm in singlewall carbon nanotubesuspensions

摘要

Singlewall carbon nanotube (SWNT) suspensions have been shown tonbe good optical limiters mainly because of their nonlinear scatteringnproperties. In this paper, we report on a pump-probe experiment couplednwith emission measurements for SWNT's in two solvents (water andnchloroform). Time-resolved probe transmission with a pump at 1064 nm andna CW probe at 633 nm permits one to associate optical limiting with thenformation of bubbles in the solvent, sublimation of the particles, andncavitation effects at high fluences. We show that the optical limitingnbehavior of SWNT's for nanosecond pulse duration is better in chloroformnthan in water due to different thermodynamic properties of the solvents