External Field-Controlled Ablation: Magnetic Field
Jovan Maksimovic,
Soon Hock Ng,
Tomas Katkus,
Bruce C. C. Cowie,
Saulius Juodkazis
Affiliations
Jovan Maksimovic
Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street., Hawthorn, VIC 3122, Australia
Soon Hock Ng
Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street., Hawthorn, VIC 3122, Australia
Tomas Katkus
Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street., Hawthorn, VIC 3122, Australia
Bruce C. C. Cowie
Australian Synchrotron, 800 Blackburn Road, Clayton, VIC 3168, Australia
Saulius Juodkazis
Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, John Street., Hawthorn, VIC 3122, Australia
The femtosecond laser ablation of silicon amidst an externally applied magnetic field in different orientations was investigated with respect to the scanning direction and polarisation of the laser beam, by observation of ablation patterns and debris displacement in a range of fluences, magnetic fields strengths, and geometries. Ultra-short ∼ 230 fs laser pulses of 1030 nm wavelengths were utilised in the single and multi-pulse irradiation modes. Ablation with an externally applied magnetic B-field B e x t ≈ 0.15 T was shown to strongly affect debris formation and deposition. The mechanism of surface plasmon polariton (SPP) wave can explain the ablated periodic patterns observed with alignment along the magnetic field lines. The application potential of external field controlled ablation is discussed.
