Optimizing attosecond pulse generation in solids by modulating electronic dynamics with monochromatic laser field

TL;DR

This paper presents a practical method for optimizing attosecond pulse generation in solids by modulating electronic dynamics through laser field adjustments, enhancing pulse control and broad applicability.

Contribution

It introduces a novel strategy to optimize attosecond pulses in solids by tuning photon energy and laser frequency, improving pulse width control across various materials.

Findings

Effective pulse width optimization demonstrated in multiple materials.

Adjusting laser frequency controls high harmonic cutoff and pulse duration.

Strategy enhances high harmonic generation performance in solids.

Abstract

A practical approach is proposed for efficiently generating ultrashort attosecond pulses (APs) from realistic solid-state materials, aiming to optimize pulse width effectively. By adjusting the photon energy while maintaining a constant peak electric field, this strategy modulates the peak vector potential and laser field period, thereby controlling the high harmonic cutoff energy and the time-domain emission characteristics of the harmonics. The field-driven electronic dynamics lead to a non-monotonic variation in both the intensity and duration of the generated attosecond pulses. The light field frequency can be adjusted to yield the optimal pulse. Beyond the primary demonstration with hexagonal boron nitride as a prototypical material, significant pulse width optimization has been achieved across a range of different materials. This straightforward and versatile strategy shows promise for application in solid-state materials, offering new pathways to promote high harmonic performance.