Chirality-Selective Excitation of Coherent Phonons in Carbon Nanotubes

Abstract

Using pre-designed trains of femtosecond optical pulses, we have selectively excited coherent phonons of the radial breathing mode of specific-chirality single-walled carbon nanotubes within an ensemble sample. By analyzing the initial phase of the phonon oscillations, we prove that the tube diameter initially increases in response to ultrafast photoexcitation. Furthermore, from excitation profiles, we demonstrate that an excitonic absorption peak of carbon nanotubes periodically oscillates as a function of time when the tube diameter undergoes radial breathing mode oscillations.

4 pages, 4 figures

References in corpus (1)

• Chiral symmetry analysis and rigid rotational invariance for the lattice dynamics of single-wall carbon nanotubes

Cited by in corpus (5)

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• Optical and Terahertz Response of Carbon Nanostructures