| Femtosecond laser ablation of Au film around single pulse threshold |
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| 作者姓名： | 倪晓昌 王清月 吴殷忠 杨丽 贾威 柴路 |
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| 作者单位： | Electronic Engineering Department Tianjin University of Technology and Education Tianjin 300222 Key Laboratory of Optoelectronic Information Technical Science，EMC，Ultrafast Laser Laboratory，School of Precision Instruments and Optoelectronics Engineering，Tianjin University，Tianjin 300072，Key Laboratory of Optoelectronic Information Technical Science EMC，Ultrafast Laser Laboratory，School of Precision Instruments and Optoelectronics Engineering，Tianjin University，Tianjin 300072，Key Laboratory of Optoelectronic Information Technical Science EMC，Ultrafast Laser Laboratory，School of Precision Instruments and Optoelectronics Engineering，Tianjin University，Tianjin 300072，Key Laboratory of Optoelectronic Information Technical Science EMC，Ultrafast Laser Laboratory，School of Precision Instruments and Optoelectronics Engineering，Tianjin University，Tianjin 300072，Key Laboratory of Optoelectronic Information Technical Science EMC，Ultrafast Laser Laboratory，School of Precision Instruments and Optoelectronics Engineering，Tianjin University，Tianjin 300072，Key Laboratory of Optoelectronic Information Technical Science EMC，Ultrafast Laser Laboratory，School of Precision Instruments and Optoelectronics Engineering，Tianjin University，Tianjin 300072 |
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| 基金项目： | This work was supported by the Key Grant Project of the Ministry of Education of China (No. 10410)the Science and Technology Development Project Fund of Tianjin (No. 043103911)the Specialized Research Fund for the Doctoral Program of Higher Education (No.2003056021), and the Postdoctoral Science Foundation in China. |
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| 摘 要： | Ablation process of 1-kHz femtosecond lasers (pulse duration of 148 fs, wavelength of 775 nm) of Au film on silica substrates is studied. The thresholds for single and multi pulses can be obtained directly from the relation between the squared diameter D2 of the ablated craters and the laser fluence φ0. From the plot of the accumulated laser fluence Nφth(N) and the number of laser pulses N, incubation coefficient of Au film is obtained to be 0.765. Some experimental data obtained around the single pulse threshold axe in good agreement with the theoretical calculation.
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