Maxwell-Drude-Bloch dissipative few-cycle optical solitons

TL;DR

This paper investigates the propagation of few-cycle optical pulses in a complex medium, demonstrating the formation of stable dissipative solitons stabilized by medium conductivity through a combined linear and nonlinear analysis.

Contribution

It introduces a Maxwell-Drude-Bloch model to describe dissipative few-cycle solitons in a conductive medium, combining linear theory and nonlinear simulations.

Findings

Stable dissipative solitons can form in conductive media.

Medium conductivity acts as a stabilization mechanism.

Numerical simulations confirm soliton stability under high-energy pulses.

Abstract

We study the propagation of few-cycle pulses in two-component medium consisting of nonlinear amplifying and absorbing two-level centers embedded into a linear and conductive host material. First we present a linear theory of propagation of short pulses in a purely conductive material, and demonstrate the diffusive behavior for the evolution of the low-frequency components of the magnetic field in the case of relatively strong conductivity. Then, numerical simulations carried out in the frame of the full nonlinear theory involving the Maxwell-Drude-Bloch model reveal the stable creation and propagation of few-cycle dissipative solitons under excitation by incident femtosecond optical pulses of relatively high energies. The broadband losses that are introduced by the medium conductivity represent the main stabilization mechanism for the dissipative few-cycle solitons.