Dephasing of G-Band Phonons in Single-Wall Carbon Nanotubes Probed via Impulsive Stimulated Raman Scattering
arXiv:1106.2858 · doi:10.1103/PhysRevB.86.161415
Abstract
We have studied the coherent dynamics of G-band phonons in single-walled carbon nanotubes through impulsive stimulated Stokes and anti-Stokes Raman scattering. The probe energy dependence of phonon amplitude as well as preferential occurrence between Stokes and anti-Stokes components in response to chirped-pulse 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 optical phonons by random frequency modulation via interaction with the RBM through anharmonicity.
4 pages, 4 figures
References in corpus (9)
- High-Field, Quasi-Ballistic Transport in Short Carbon Nanotubes
- Optical Phonons in Carbon Nanotubes: Kohn Anomalies, Peierls Distortions and Dynamic Effects
- Interband Recombination Dynamics in Resonantly-Excited Single-Walled Carbon Nanotubes
- Room temperature Peierls distortion in small radius nanotubes
- Coherent Lattice Vibrations in Carbon Nanotubes
- Stability of 1-D Excitons in Carbon Nanotubes under High Laser Excitations
- Chirality-Selective Excitation of Coherent Phonons in Carbon Nanotubes
- Inelastic Quantum Transport and Peierls-like Mechanism in Carbon Nanotubes
- Resonant Coherent Phonon Spectroscopy of Single-Walled Carbon Nanotubes