Observation of fs-laser spallative ablation using soft X-ray laser probe
| Autor: | Motoyoshi Baba, Rui Izutsu, Naoya Kakimoto, Yasuo Minami, Noboru Hasegawa, Tetsuya Kawachi, Takuro Tomita, Tohru Suemoto, Masaharu Nishikino, Takashi Eyama |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science business.industry medicine.medical_treatment Shell (structure) Laser Ablation 01 natural sciences law.invention 010309 optics Interferometry Optics law 0103 physical sciences Astronomical interferometer medicine Shadowgraph Spallation business Layer (electronics) |
| Zdroj: | Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXII. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2255725 |
| Popis: | The initial stages of femtosecond laser ablation of gold were observed by single-shot soft X-ray laser interferometer and reflectometer. The ablation front surface and the spallation shell dome structure were observed from the results of the soft X-ray interferogram, reflective image, and shadowgraph. The formation and evolution of soft X-ray Newton’s rings (NRs) were found by reflective imaging at the early stages of the ablation dynamics. The soft X-ray NRs are caused by the interference between the bulk ablated surface and nanometer-scale thin spallation layer. The spallation layer was kept at the late timing of the ablation dynamics, and the height of that reached over 100 μm. The temporal evolution of the bulk ablated surface was observed in the ablation dynamics. From these results, we have succeeded in obtaining the temporal evolution of the ablation front exfoliated from the gold surface. |
| Databáze: | OpenAIRE |
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