Using a pump–probe method with a 150 fs laser at the wavelength of 1.55 μm, we have experimentally demonstrated that single-walled carbon nanotubes (SWNT) have an exciton decay time of less than 1 ps and a high third-order polarizability, which is reasonably interpreted as due to their azimuthal symmetry. These experimental results reveal that a SWNT polymer composite may be a candidate material for high-quality subpicosecond all-optical switches.
Ultrafast optical switching properties of single-wall carbon nanotube polymer composites at 1.55 μm
Y.-C. Chen, N. R. Raravikar, L. S. Schadler, P. M. Ajayan, Y.-P. Zhao, T.-M. Lu, G.-C. Wang, X.-C. Zhang; Ultrafast optical switching properties of single-wall carbon nanotube polymer composites at 1.55 μm. Appl. Phys. Lett. 5 August 2002; 81 (6): 975–977. https://doi.org/10.1063/1.1498007
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