Control of ultrashort optical electromagnetic pulses in carbon nanotubes at low temperatures

TL;DR

This paper investigates the propagation and control of ultrashort electromagnetic pulses in zigzag carbon nanotubes at low temperatures, deriving equations for pulse behavior and demonstrating pulse shape manipulation via external electric fields.

Contribution

It introduces a microscopic model for electromagnetic pulse propagation in carbon nanotubes considering electron-phonon interactions and derives nonlinear equations for pulse control.

Findings

Derived an efficient equation for the vector potential amplitude.

Obtained soliton solutions analogous to those with cosine dispersion.

Showed the possibility of controlling optical pulse shape over a wide range.

Abstract

Propagation of the alternating electromagnetic field in a system of zigzag carbon nanotubes in the case of low temperatures and applied external electric fields are considered. The electronic system of the carbon nanotubes is investigated microscopically nonmetering an interaction with a phonon subsystem by the fact that the electromagnetic pulse is critically short. An efficient equation for the vector-potential amplitude of the alternating electromagnetic field is obtained. Solutions of solitons analogs which correspond to solitons in the case of cosine dispersion law for the electronic subsystem have been elicited. The dependences of obtained nonlinear solutions on problem parameters and the applied external electric fields were analyzed. The possibility to control the shape of optical pulse in wide range was shown.