کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5369626 1388443 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Single- and multi-pulse formation of surface structures under static femtosecond irradiation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Single- and multi-pulse formation of surface structures under static femtosecond irradiation
چکیده انگلیسی

Femtosecond surface structure modifications are investigated under irradiation with laser pulses of 150 fs at 800 nm, on copper and silicon. We report sub-wavelength periodic structures formation (ripples) with a periodicity of 500 nm for both materials. These ripples are perpendicular to the laser polarization and can be obtained with only one pulse. The formation of these ripples corresponds to a fluence threshold of 1 J/cm2 for copper and 0.15 J/cm2 for silicon. We find several morphologies when more pulses are applied: larger ripples parallel to the polarization are formed with a periodicity of 1 μm and degenerate into a worm-like morphology with a higher number of pulses. In addition, walls of deep holes also show sub-wavelength and large ripples.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 19, 31 July 2007, Pages 8075-8079
نویسندگان
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