Chirality-Selective Excitation of Coherent Phonons in Carbon Nanotubes

Chirality-Selective Excitation of Coherent Phonons in Carbon Nanotubes

Physical Review Letters 102, 037402 (2009) 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 o...

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Bibliographic Details
Main Authors: Kim, J. -H, Han, K. -J, Kim, N. -J, Yee, K. -J, Lim, Y. -S, Sanders, G. D, Stanton, C. J, Booshehri, L. G, Haroz, E. H, Kono, J
Format: Journal Article
Language:English
Published: 19-12-2008
Subjects:
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Online Access:Get full text
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Summary:Physical Review Letters 102, 037402 (2009) 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.
DOI:10.48550/arxiv.0805.2206