Breathing coherent phonons and caps fragmentation in carbon nanotubes following ultrafast laser pulses

Traian Dumitricǎ, Martin E. Garcia, Harald Olaf Jeschke, Boris I. Yakobson

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The response of carbon nanotubes to femtosecond laser pulses is studied with a nonadiabatic simulation technique, which accounts for the evolution of electronic and ionic degrees of freedom, and for the coupling with the external electromagnetic field. As a direct result of electronic excitation, three coherent breathing phonon modes are excited: two radial vibrations localized in the caps and cylindrical body, and one longitudinal vibration coupled to the nanotube length. Under high absorbed energies (but below 2.9 eV /atom, the graphite's ultrafast fragmentation threshold), the resulting oscillatory motion leads to the opening of nanotube caps. Following the cap photofragmentation the nanotube body remains intact for the rest of the 2 ps simulation time.

Original languageEnglish
Article number193406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number19
DOIs
Publication statusPublished - 2006
Externally publishedYes

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Ultrafast lasers
Carbon Nanotubes
Phonons
breathing
caps
Nanotubes
Laser pulses
Carbon nanotubes
nanotubes
fragmentation
phonons
carbon nanotubes
pulses
cylindrical bodies
lasers
vibration
Graphite
Ultrashort pulses
electronics
Electromagnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Breathing coherent phonons and caps fragmentation in carbon nanotubes following ultrafast laser pulses. / Dumitricǎ, Traian; Garcia, Martin E.; Jeschke, Harald Olaf; Yakobson, Boris I.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 74, No. 19, 193406, 2006.

Research output: Contribution to journalArticle

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