# Ultrashort magnetic impulses driven by coherent control with vector beams

## TL;DR

This paper presents a novel all-optical method to generate ultrashort, spatially isolated magnetic impulses using coherent control with azimuthally polarized laser beams, enabling advanced magnetic spectroscopy.

## Contribution

It introduces a new technique for creating magnetic impulses through coherent control of currents with vector beams, achieving ultrafast, isolated magnetic fields in the terahertz range.

## Key findings

- Magnetic impulses are generated with Tesla-scale strength.
- The impulses are confined to terahertz bandwidths.
- Magnetic fields are spatially separated from electric fields.

## Abstract

We introduce a new technique for the generation of magnetic impulses. This technique is based on coherent control of electrical currents using cylindrical laser beams with azimuthal polarization. When used to ionize a medium, in this case atomic hydrogen is considered, an azimuthal current impulse is driven. The spatial distribution of this current bears close resemblance to that of a solenoid, and produces a magnetic field impulse. The excitation and relaxation dynamics of this current temporally confine the resulting magnetic field to a Tesla-scale, terahertz bandwidth impulse. Importantly, the magnetic fields are spatially isolated from electric fields. This all-optical approach will enable ultrafast time-domain spectroscopy of magnetic phenomena.