Heating process and damage threshold analysis of Au film coated on Cu substrate for femtosecond laser |
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| Authors: | Tingfeng Wang Jin Guo Junfeng Shao Tao Sun Anmin Chen Hang Liu Dajun Ding |
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| Institution: | 1. State Key Laboratory of Laser Interaction with Matter, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People’s Republic of China;2. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, People’s Republic of China |
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| Abstract: | The heating processes of a two-layer film assembly of Au padded with Cu irradiated by femtosecond laser pulse are studied using a two-temperature model. It is found that the chosen substantially influence the energy transport, and consequently the temperature variation, and thermal equilibrium time. At the same laser fluence, the different thickness of gold film leads to a change of gold surface temperature. By choosing the thickness of the gold layer in the two-layer film assemblies, the damage threshold of the gold film can be maximized. The results can be used to optimize the damage threshold of gold coating optical components. |
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