A5029940995- Laser Material Processing Techniques
- Laser-induced spectroscopy and plasma
- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Manufacturing Process and Optimization
- Ocular and Laser Science Research
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Semiconductor materials and devices
- Advanced Fiber Laser Technologies
- High Entropy Alloys Studies
- Atomic and Molecular Physics
- Nuclear physics research studies
- Mechanical and Optical Resonators
Danish Technological Institute
2019-2023
Hebei University
2021
Aarhus University
2014-2017
Simultaneous time-and-space resolved reflectivity and interferometric measurements over a temporal span of 300 ps have been performed in fused silica sapphire samples excited with 800 nm, 120 fs laser pulses at energies slightly well above the ablation threshold. The experimental results simulated frame multiple-rate equation model including light propagation. comparison evolution 400 nm clearly shows that two techniques interrogate different material volumes during course process. While...
When band gap materials are irradiated with an ultrashort laser pulse, the free-carrier density increases tremendously. The resulting abrupt transformation from insulator to a conducting material, where large portion of electrons is excited conduction band, induces huge changes in optical parameters. transient nature these parameters often modeled based on Drude model, there much uncertainty concerning collision frequency. As this frequency has great impact modeling results, work discusses...
Abstract The multiconfiguration Dirac–Hartree–Fock (MCDHF) and relativistic configuration interaction methods are used to provide excitation energies, lifetimes, radiative transition data for the 604 (699, 702, 704, 699) lowest levels of 3 s 2 p , d 4 f 5 configurations in Cr xi (Mn xii Fe xiii Co xiv Ni xv Cu xvi Zn xvii ). Previous line identifications EUV X-ray wavelength ranges reviewed by comprehensively comparing MCDHF theoretical results with available experimental data. Many recent...
Ultrashort-pulse laser excitation of dielectrics is an intricate problem due to the strong coupling between rapidly changing material properties and light. In present paper, details a model based on multiple-rate-equation description conduction band are provided. The verified by comparison with recent experimental measurements transient optical in combination ablation-depth determinations. process from first creation conduction-band electrons at low intensities formation highly-excited...
Although much research has focused on AlSi10Mg processed via laser-based powder bed fusion, the material deformation mechanisms at microscale are still unclear. To improve current understanding, 3D measurements of strain field microstructural scale needed to complement surface-based SEM observations. This work demonstrates that X-ray tomography combined with digital volume correlation can be used measure in bulk using Si-rich particles contained heat-treated microstructure as markers. The...
Although much research has focused on AlSi10Mg processed via laser-based powder bed fusion, the material deformation mechanisms at microscale are still unclear. To improve current understanding, 3D measurements of strain field microstructural scale needed to complement surface-based SEM observations. This work demonstrates that X-ray tomography combined with digital volume correlation can be used measure in bulk using Si-rich particles contained heat-treated microstructure as markers. The...