Abstract

Experimental measurements of nonlinear optical extinction of nanosecond laser pulses by a set of conjugated copolymer/multiwalled carbon-nanotube composites dispersed in solution are reported here. The polymer poly(para-phenylenevinylene-co-2,5-dioctyloxy-meta-phenylenevinylene) and multiwalled carbon-nanotube composites were varied according to nanotube mass content. The experiments were performed with an open-aperture Z scan with 6-ns Gaussian pulses at 532 nm from a frequency-doubled, Q-switched Nd:YAG laser. The nonlinear optical extinction of the incident pulses displays enhanced dissipation of the incident light for lower incident intensities relative to increasing multiwalled carbon-nanotube content. Either the multiwalled carbon nanotubes or the polymer dominates the nonlinear response of the composite depending on the relative mass of polymer to nanotube. Effective optical coefficients with a nonlinear absorption based model are calculated, and their intensity dependence is investigated. Mechanistic implications of the optical dissipation are also discussed.

© 2003 Optical Society of America

Nonlinear photoluminescence from van Hove singularities in multiwalled carbon nanotubes

Margaret E. Brennan, Jonathan N. Coleman, Anna Drury, Bernd Lahr, Takeyuki Kobayashi, and Werner J. Blau
Opt. Lett. 28(4) 266-268 (2003)

Investigation of an optical limiting mechanism in multiwalled carbon nanotubes

Xuan Sun, Yuenan Xiong, Ping Chen, Jianyi Lin, Wei Ji, Jin Hong Lim, Sidney S. Yang, David J. Hagan, and Eric W. Van Stryland
Appl. Opt. 39(12) 1998-2001 (2000)

Light-scattering and dispersion behavior of multiwalled carbon nanotubes

Craig Saltiel, Siva Manickavasagam, M. Pinar Mengüc, and Rodney Andrews
J. Opt. Soc. Am. A 22(8) 1546-1554 (2005)

Diameter-dependent shielding effectiveness and terahertz conductivity of multiwalled carbon nanotubes

Debanjan Polley, Kumar Neeraj, Anjan Barman, and Rajib Kumar Mitra
J. Opt. Soc. Am. B 33(12) 2430-2436 (2016)

Picosecond and nanosecond polychromatic pump–probe studies of bubble growth in carbon-nanotube suspensions

Laurent Vivien, Didier Riehl, Jean-François Delouis, Jacques A. Delaire, François Hache, and Eric Anglaret
J. Opt. Soc. Am. B 19(2) 208-214 (2002)