کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350919 | 1503638 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Femtosecond laser-induced cross-periodic structures on a crystalline silicon surface under low pulse number irradiation
ترجمه فارسی عنوان
ساختارهای متقاطع دوره ای ناشی از لیتوم فموتسکون بر روی سطح سیلیکون بلوری تحت اشعه کم پالس
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کلمات کلیدی
لیزر فموستیک سیلیکون، ساختار سطحی متقابل دوره ای، قطبش،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
A cross-patterned surface periodic structure in femtosecond laser processing of crystalline silicon was revealed under a relatively low shots (4 < N < 10) with the pulse energy slightly higher than the ablation threshold. The experimental results indicated that the cross-pattern was composed of mutually orthogonal periodic structures (ripples). Ripples with a direction perpendicular to laser polarization (Râ¥) spread in the whole laser-modified region, with the periodicity around 780 nm which was close to the central wavelength of the laser. Other ripples with a direction parallel to laser polarization (Râ) were found to be distributed between two of the adjacent ripples Râ¥, with a periodicity about the sub-wavelength of the irradiated laser, 390 nm. The geometrical morphology of two mutually orthogonal ripples under static femtosecond laser irradiation could be continuously rotated as the polarization directions changed, but the periodicity remained almost unchanged. The underlying physical mechanism was revealed by numerical simulations based on the finite element method. It was found that the incubation effect with multiple shots, together with the redistributed electric field after initial ablation, plays a crucial role in the generation of the cross-patterned periodic surface structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 326, 30 January 2015, Pages 216-221
Journal: Applied Surface Science - Volume 326, 30 January 2015, Pages 216-221
نویسندگان
Xu Ji, Lan Jiang, Xiaowei Li, Weina Han, Yang Liu, Andong Wang, Yongfeng Lu,