Ultrafast Stimulated Raman Scattering in Carbon Nanotubes

ORAL

Abstract

We perform ultrafast transient absorption spectroscopy on (6,5) carbon nanotubes in aqueous solution, using a near-IR pump and supercontinuum near-IR probe. We observe stimulated Raman scattering between the pump and probe light involving the nanotube G phonon mode, and examine the dependence of this Raman feature on the pump and probe wavelengths and pump fluence. We find that the stimulated Raman process is enhanced when the probe energy is near the nanotube exciton resonance, allowing us to investigate exciton-phonon coupling in the nanotubes.

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Presenters

  • Steven Drapcho

    University of California, Berkeley

Authors

  • Steven Drapcho

    University of California, Berkeley

  • Chaw Keong Yong

    University of California, Berkeley

  • Avishek Saha

    Los Alamos National Lab

  • Stephen K. Doorn

    Los Alamos National Lab, Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

  • Feng Wang

    University of California - Berkeley, University of California, Berkeley, Physics, UC Berkeley, Department of Physics, University of California at Berkeley, Berkeley, CA 94709, USA, University of California at Berkeley, Lawrence Berkeley National Laboratory and UC Berkeley, UC Berkeley, Physics, University of California, Berkeley