PECULIARITIES OF THE OPTICAL POLARIZABILITY OF SINGLEWALLED ZIGZAG CARBON NANOTUBE WITH CAPPED AND TAPERED ENDS

modeling of the linear optical polarizability of singlewalled carbon nanotubes (SWCNTs) of the zigzag type (n,0) with different diameter capped at one end by half of fullerene and tapered at the other end so that it can be connected with different (n,n) armchair nanotubes is carried out. The calculations were carried out within the Su-Schrieffer-Heeger model. It is shown that the localized states demonstrate the nonlinear aspects of excited states in that system. It is found that the molecules with different radius have strong oscillating dependence of the optical polarizability on the incident light energy. The effect of the length, capping of the tube end, and the Coulomb repulsion on the optical polarizability spectrum is studied.