Laser-Metal Interaction with a Pulse Shorter than the Ion Period: Ablation Threshold, Electron Emission and Ion Explosion

Article Physics, Multidisciplinary

X-ray multiphoton-induced Coulomb explosion images complex single molecules

Rebecca Boll et al.

Summary: Intense femtosecond X-ray pulses can visualize the structural dynamics of exploding photoionized molecules, providing important insights into chemical reactions.

NATURE PHYSICS (2022)

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Article Physics, Multidisciplinary

Spatio-temporal control of THz emission

Hsin-hui Huang et al.

Summary: By using a tilted micro-thin water flow and cross-linearly-polarised femtosecond laser pulses, fine control of the polarisation of terahertz (THz) emission is demonstrated. The intensity of THz emission is significantly enhanced with optimized double-pulse irradiation, resulting in improved photon-number-based efficiency.

COMMUNICATIONS PHYSICS (2022)

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Article Physics, Multidisciplinary

Ablating Ion Velocity Distributions in Short-Pulse-Heated Solids via X-Ray Doppler Shifts

B. F. Kraus et al.

Summary: This study presents the first measurements of bulk ion velocity distributions during the initiation of solid ablation under ultrarelativistic laser intensities. Bayesian analysis reveals that bulk ions are either stationary or flowing outward at the plasma sound speed. The results quantitatively constrain the laser-plasma ablation mechanism, suggesting that a steplike electrostatic potential structure drives solid disassembly.

PHYSICAL REVIEW LETTERS (2022)

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Article Materials Science, Multidisciplinary