A highly automated apparatus for ultra-fast laser ablation studies

Area of Science:

• Materials Science
• Laser Physics
• Surface Science

Background:

• Ultra-short laser pulse ablation is crucial for precision material processing.
• Systematic studies require efficient and automated experimental setups.
• In situ diagnostics are vital for understanding ablation mechanisms.

Purpose of the Study:

• To introduce a novel, automated experimental apparatus for ultra-short laser pulse ablation studies.
• To enable extensive systematic investigations across various experimental parameters.
• To demonstrate the apparatus's capability in determining ablation thresholds.

Main Methods:

• Development of a fully automated experimental setup for laser ablation.
• In situ imaging of incident beam, reflected spot, and ablated sites.
• Systematic variation of parameters: pulse energy, duration, number, time, and focus size.

Main Results:

• The apparatus successfully generated numerous ablation sites on crystalline silicon.
• Single-shot ablation threshold was determined as a function of pulse duration using in situ data.
• Results were validated against optical interferometric profilometry, showing good agreement with literature.

Conclusions:

• The novel apparatus provides a powerful tool for systematic laser ablation research.
• In situ data acquisition enables accurate determination of ablation thresholds.
• The setup's efficiency and versatility accelerate the study of laser-matter interactions.