We investigate pulse duration and wavelength effects on the optical limiting behavior of single-wall carbon nanotubes suspended either in chloroform or in water. The principal optical limiting effect in carbon nanotube suspensions is nonlinear scattering that is due to heat transfer from particles to solvent, leading to solvent-bubble formation and to sublimation of carbon nanotubes. We report on nonlinear transmittance measurements for pulse durations ranging from 3 to 100 ns and for wavelengths from 430 to 1064 nm. The dependence of optical limiting behavior on pulse duration and wavelength is analyzed and discussed in terms of nonlinear mechanisms.
© 2001 Optical Society of America
(190.3970) Nonlinear optics : Microparticle nonlinear optics
(190.4400) Nonlinear optics : Nonlinear optics, materials
(190.4870) Nonlinear optics : Photothermal effects
(290.5850) Scattering : Scattering, particles
L. Vivien, D. Riehl, P. Lançon, F. Hache, and E. Anglaret, "Pulse duration and wavelength effects on the optical limiting behavior of carbon nanotube suspensions," Opt. Lett. 26, 223-225 (2001)