Linear build-up of Fano resonance spectral profiles

TL;DR

This paper investigates the dynamic formation of Fano resonance spectral profiles in various physical systems using ultrashort laser pulses, revealing time-dependent build-up processes through numerical simulations.

Contribution

It introduces a detailed analysis of the temporal evolution of Fano resonances under ultrashort pulse excitation across different physical systems.

Findings

Time-dependent Fano spectral profiles are formed under ultrashort pulses.

Numerical simulations show the build-up dynamics in diverse systems.

Spectral profiles evolve on attosecond and femtosecond timescales.

Abstract

The build-up dynamics of a continuous spectrum under the action of a weak laser field on a Fano resonance with the use of the pulses with the Lorentz spectrum and ultrashort pulses in the wavelet form is investigated. A dispersion-time excitation dependence of the Fano resonances in a He atom, in an InP impurity semiconductor, in longitudinal optical LO-phonons of a shallow donor exciton in pure ZnO crystals, and in metamaterials are calculated. The numerical simulation of the dynamics has shown time-dependent formation a Fano spectral profile in the systems of different physical natures under the action of ultrashort pulses with attosecond and femtosecond durations.