2003/11/11 by Hendry Izaac Elim, H. I. Elim, Wei Ji +7 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Mechanical and Optical Resonators #Nonlinear Optical Materials Studies #cond-mat.mtrl-sci #cond-mat.str-el #physics.chem-ph #physics.optics
paper · pdf · doi:10.1063/1.1786371
published as Appl Phys Lett 85 (10), pp. 1799-1801 (2004) · 12 pages, 4 figures, submitted to Appl. Phys. Lett. (2003)
arxiv created 2003/11/11 · openalex publication_date 2004/09/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
By using femtosecond laser pulses at a wavelength range from 720 to 780nm, we have observed absorptive and refractive nonlinearities in a film of multiwalled carbon nanotubes grown mainly along the direction perpendicular to the surface of quartz substrate. The z-scans show that both absorptive and refractive nonlinearities are of negative and cubic nature in the laser irradiance range from a few to 300GW∕cm2. The magnitude of the third-order nonlinear susceptibility, χ(3), is of an order of 10−11esu. The degenerate pump–probe measurement reveals a relaxation time of ∼2ps.