Volume 64, Number 2, October 2003
|Page(s)||225 - 231|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Plasmon-polaritons for a nanotube in an intense terahertz field
Department of Physics and Astronomy,
Hunter College of the City University of New York -
695 Park Avenue, New York, NY 10021, USA
2 Department of Chemistry, College of Staten Island of the City University of New York 2800 Victory Boulevard, Staten Island, NY 10314, USA
Accepted: 7 August 2003
We calculate the exact time-dependent single-particle eigenstates for electrons in an intense terahertz laser field applied along the axis of a cylindrical nanotube. Making use of these results and linear-response theory, we obtain the charge density fluctuations for an interacting electron gas confined to the surface of the nanotube. The dispersion equation for the collective plasmon-polariton excitations is derived. Numerical results are presented for the dispersion relation as a function of the wave vector along the axis of the nanotube.
PACS: 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 71.45.Gm – Exchange, correlation, dielectric and magnetic response functions, plasmons / 61.46.+w – Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals
© EDP Sciences, 2003
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