Journal of Physical Studies 14(4), Article 4701 [9 pages] (2010)
DOI: https://doi.org/10.30970/jps.14.4701

THE MOMENT PULSE TRANSFER TO THE ASYMMETRICAL METALLIC NANO-PARTICLE FROM THE ULTRASHORT LASER PULSE

P. M. Tomchuk^{1}, N. I. Grigorchuk^{2}
^{1}Institute for Physics, NAS of Ukraine, 46, Nauka Ave., Kyiv, UA--03680
е-mail: ptomchuk@iop.kiev.ua
^{2}Bogolyubov Institute for Theoretical Physics, NAS of Ukraine, 14-b, Metrologichna St., Kyiv, UA--03680,
e-mail: ngrigor@bitp.kiev.ua

The theory for the mechanical moment transfer to the asymmetrical nanoparticle from the ultrashort laser pulse is developed. It is established that the optical conductivity becomes a tensor for the particle sizes less than the electron free pass in it. The diagonal elements of this conductivity define the half-widths of the plasmon resonances. The expressions for the components of the polarization tensor of a spheroidal metallic nanoparticle is obtained.

PACS number(s): 78.67.Bf, 42.50.Md, 32.80.Lg