Ablation dynamics of solids heated by femtosecond laser pulses
Ultrafast time resolved microscopy of femtosecond laser irradiated surfaces reveals a universal feature of the ablating surface on nanosecond time scale. All investigated materials show rings in the ablation zone, which were identified as an interference pattern (Newton fringes). Optically sharp sur...
| Main Authors: | , , , , , , |
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| Format: | Conference item |
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2001
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| _version_ | 1797064915866877952 |
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| author | Rethfeld, B Sokolowski-Tinten, K Temnov, V Kudryashov, S Bialkowski, J Cavalleri, A von der Linde, D |
| author_facet | Rethfeld, B Sokolowski-Tinten, K Temnov, V Kudryashov, S Bialkowski, J Cavalleri, A von der Linde, D |
| author_sort | Rethfeld, B |
| collection | OXFORD |
| description | Ultrafast time resolved microscopy of femtosecond laser irradiated surfaces reveals a universal feature of the ablating surface on nanosecond time scale. All investigated materials show rings in the ablation zone, which were identified as an interference pattern (Newton fringes). Optically sharp surfaces occur during expansion of the heated material as a result of anomalous hydrodynamic expansion effects. Experimentally, the rings are observed within a certain fluence range which strongly depends on material parameters. The lower limit of this fluence range is the ablation threshold. We predict a fluence ratio between the upper and the lower fluence limit approximately equal to the ratio of critical temperature to boiling temperature at normal pressure. This estimate is experimentally confirmed on different materials (Si, graphite, Au, Al). |
| first_indexed | 2024-03-06T21:21:09Z |
| format | Conference item |
| id | oxford-uuid:417bf99f-9ff7-4109-889b-c5546ecc50f3 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T21:21:09Z |
| publishDate | 2001 |
| record_format | dspace |
| spelling | oxford-uuid:417bf99f-9ff7-4109-889b-c5546ecc50f32022-03-26T14:43:56ZAblation dynamics of solids heated by femtosecond laser pulsesConference itemhttp://purl.org/coar/resource_type/c_5794uuid:417bf99f-9ff7-4109-889b-c5546ecc50f3Symplectic Elements at Oxford2001Rethfeld, BSokolowski-Tinten, KTemnov, VKudryashov, SBialkowski, JCavalleri, Avon der Linde, DUltrafast time resolved microscopy of femtosecond laser irradiated surfaces reveals a universal feature of the ablating surface on nanosecond time scale. All investigated materials show rings in the ablation zone, which were identified as an interference pattern (Newton fringes). Optically sharp surfaces occur during expansion of the heated material as a result of anomalous hydrodynamic expansion effects. Experimentally, the rings are observed within a certain fluence range which strongly depends on material parameters. The lower limit of this fluence range is the ablation threshold. We predict a fluence ratio between the upper and the lower fluence limit approximately equal to the ratio of critical temperature to boiling temperature at normal pressure. This estimate is experimentally confirmed on different materials (Si, graphite, Au, Al). |
| spellingShingle | Rethfeld, B Sokolowski-Tinten, K Temnov, V Kudryashov, S Bialkowski, J Cavalleri, A von der Linde, D Ablation dynamics of solids heated by femtosecond laser pulses |
| title | Ablation dynamics of solids heated by femtosecond laser pulses |
| title_full | Ablation dynamics of solids heated by femtosecond laser pulses |
| title_fullStr | Ablation dynamics of solids heated by femtosecond laser pulses |
| title_full_unstemmed | Ablation dynamics of solids heated by femtosecond laser pulses |
| title_short | Ablation dynamics of solids heated by femtosecond laser pulses |
| title_sort | ablation dynamics of solids heated by femtosecond laser pulses |
| work_keys_str_mv | AT rethfeldb ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses AT sokolowskitintenk ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses AT temnovv ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses AT kudryashovs ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses AT bialkowskij ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses AT cavalleria ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses AT vonderlinded ablationdynamicsofsolidsheatedbyfemtosecondlaserpulses |