Kim, J.-H.Yee, K.-J.Lim, Y.-S.Booshehri, L.G.Haroz, E.H.Kono, J.2013-03-142013-03-142012Kim, J.-H., Yee, K.-J., Lim, Y.-S., et al.. "Dephasing of G-band phonons in single-wall carbon nanotubes probed via impulsive stimulated Raman scattering." <i>Physical Review B,</i> 86, (2012) American Physical Society: 161415(R). http://dx.doi.org/10.1103/PhysRevB.86.161415.https://hdl.handle.net/1911/70621We study the coherent dynamics of G-band phonons in single-wall carbon nanotubes through impulsive stimulated Stokes and anti-Stokes Raman scattering. The probe energy dependence of the phonon amplitude as well as the preferential occurrence between Stokes and anti-Stokes components in response to chirpedpulse excitation are well explained within our model. The temperature dependence of the observed dephasing rate clearly exhibits a thermally activated component, with an activation energy that coincides with the frequency of the radial breathing mode (RBM). This fact provides a clear picture for the dephasing of G-band phonons by random frequency modulation via interaction with the RBM through anharmonicity.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevB.86.161415