Ultrafast Generation of Fundamental and Multiple-order Phonon Excitations in Highly-Enriched (6,5) Single-Wall Carbon Nanotubes

Abstract

Using a macroscopic ensemble of highly-enriched (6,5) single-wall carbon nanotubes, combined with high signal-to-noise ratio, time-dependent differential transmission spectroscopy, we have generated vibrational modes in an ultrawide spectral range (10-3000 cm^{-1}). A total of fourteen modes were clearly resolved and identified, including fundamental modes of A, E1, and E2 symmetries and their combinational modes involving two and three phonons. Through comparison with CW Raman spectra as well as calculations based on an extended tight-binding model, we were able to identify all the observed peaks and determine the frequencies of the individual and combined modes. We provide a full summary of phonon frequencies for (6,5) nanotubes that can serve as a basic reference with which to refine our understanding of nanotube phonon spectra as well as a testbed for new theoretical models.

8 pages, 3 figures

References in corpus (3)

• Plasmonic Nature of the Terahertz Conductivity Peak in Single-Wall Carbon Nanotubes
• Fundamental Optical Processes in Armchair Carbon Nanotubes
• Coherent Phonons in Carbon Nanotubes and Graphene

Cited by in corpus (7)

• Terahertz Science and Technology of Carbon Nanomaterials
• Terahertz Excitonics in Carbon Nanotubes: Exciton Autoionization and Multiplication
• Origin of coherent G band phonon spectra in single wall carbon nanotubes
• Electronic Raman Scattering in Suspended Semiconducting Carbon Nanotubes
• Selective coherent phonon mode generation in single wall carbon nanotubes
• Exciton lasing in carbon nanotubes below the population inversion threshold via phonon-mediated stimulated emission
• Origin of the Background Absorption in Carbon Nanotubes: Phonon-Assisted Excitonic Continuum