Electric field control of ultrashort pulse dynamics in polymer-carbon nanotube composites

Abstract

This work investigates the dynamics of ultrashort optical pulses, consisting of a single field oscillation, in a polymer composite with carbon nanotubes under the influence of an external electric field. A classical approach based on Maxwell's equations is used to describe the electromagnetic pulses.
The study of controlling the characteristics of such pulses is one of the key challenges not only in modern optics but also in other fields, as ultrashort pulses find applications at the intersection of various disciplines, including chemistry, biology, and computer science. At the same time, carbon nanotubes (CNTs) have attracted significant attention due to their proven effectiveness in optical applications, such as optical limiters, switches, and saturable absorbers in mode-locked fiber lasers for generating short-duration pulses (in the picosecond and femtosecond ranges). Notably, here we consider carbon nanotubes embedded in a polymer matrix to define a specific structure and orientation of the CNT array.
An important aspect is accounting for the influence of external electric and magnetic fields, which can significantly modify the dispersion and nonlinear properties of the medium, as well as open new possibilities for controlling the parameters of ultrashort optical pulses. This is the main focus of the present study.
As a result of the research, the evolution patterns of electromagnetic pulses have been identified, and the influence of an external alternating electric field (amplitude and frequency) as well as polymer concentration on their characteristics has been analyzed.

Speaker

Natalia Konobeeva
Volgograd State University
Russia

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