Ablation control by applying magnetic and electric fields

摘要

Laser fabrication with ultra-short laser pulses (sub-1 ps) have the ability for precise energy delivery to targetmaterials for ablation, spallation or polymerisation down to sub-wavelength resolution. We show, that by apply-ing electrical and magnetic fields, the electron-ion ablation plasma can be controlled following the Lorentz forceexerted on to the plasma F = eE+e[v×B], where v is velocity of charge e, E is the applied electrical bias andB is the magnetic ux density. The vectorial nature of the Lorentz force was investigated using the ablation ofsilicon. The application potential for ablation debris control and mass, charge spectroscopes of ablated materialsis discussed.