Nonlinear absorption mechanisms during femtosecond laser surface ablation of silica glass
| Autor: | E. D. Startseva, Sergey I. Kudryashov, Irina N. Saraeva, D. A. Zayarny, Roman A. Khmelnitskii, A. A. Ionin |
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| Rok vydání: | 2016 |
| Předmět: |
Microscope
Tunable diode laser absorption spectroscopy Materials science Physics and Astronomy (miscellaneous) Solid-state physics business.industry medicine.medical_treatment Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser Ablation 01 natural sciences Molecular physics law.invention Pulse (physics) Optics law 0103 physical sciences Femtosecond medicine 010306 general physics 0210 nano-technology business Absorption (electromagnetic radiation) |
| Zdroj: | JETP Letters. 103:309-312 |
| ISSN: | 1090-6487 0021-3640 |
| Popis: | Spatial profiles of single-shot microcraters produced by tightly focused femtosecond laser pulses with variable pulse energies are measured by means of a laser confocal microscope. Dependences of crater depth on laser intensity at different pulse energies appear as overlapping saturating curves with the same threshold, indicating the presence of nonlinear absorption and absence of nonlocal ablation effects. A monotonic twofold increase in absorption nonlinearity is related to the transition from minor defect-band absorption to fundamental band-to-band absorption. |
| Databáze: | OpenAIRE |
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