Tailoring surface topographies on solids with Mid-IR femtosecond laser pulses
نویسندگان
چکیده
Irradiation of solids with ultrashort pulses using laser sources in the mid-infrared (mid-IR) spectral region is a yet predominantly unexplored field that opens broad possibilities for efficient and precise surface texturing wide range applications. In present work, we investigate both experimentally theoretically impact on generation modification related effects subsequent patterning metallic semiconducting materials. Through parametric study correlate mid-IR pulsed parameters onset material damage formation variety periodic structures at wavelength ?L = 3200 nm pulse duration ?p 45 fs. Results nickel silicon indicate produced topographies comprise high low spatial frequency induced structures, similar to those observed lower wavelengths, while groove absent. The investigation thresholds suggests incorporation nonlinear generated from three-photon-assisted excitation (for silicon) consideration role non-thermal excited electron population nickel) very short durations. results demonstrate potential structuring pulses, which can constitute systematic novel engineering approach strong fields long-wavelength regions be used advanced industrial
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ژورنال
عنوان ژورنال: Applied Surface Science
سال: 2023
ISSN: ['1873-5584', '0169-4332']
DOI: https://doi.org/10.1016/j.apsusc.2022.155879