Influences of initial surface conditions on response characteristics of amorphous silicon films to nanosecond laser irradiation

doi:10.3390/mi12070807

CIOMP OpenIR

	Influences of initial surface conditions on response characteristics of amorphous silicon films to nanosecond laser irradiation
	Y. Ren and Z. Zhang
	2021
发表期刊	Micromachines
ISSN	2072666X
卷号	12 期号:7
摘要	Although laser-produced micro-/nano-structures have been extensively studied, the effects of the initial surface conditions on the formed micro-/nano-structures have rarely been investigated. In this study, through nanosecond pulsed laser irradiation of unpolished and polished amorphous silicon films, entirely different surface characteristics were observed. The effects of laser irradiation parameters, such as repetition frequency, beam overlap ratio, and scanning velocity, on the surface characteristics were investigated, followed by the characterization of surface roughness, energy-dispersive X-ray spectroscopy, and Raman spectroscopy of the irradiated surfaces. For the unpolished surface, novel micro-protrusions were generated after laser irradiation, whereas no such micro-protrusions were formed on the polished surface. The experimental results indicated that the height of the micro-protrusions could be tuned using laser irradiation parameters and that laser irradiation promoted the crystallization of the amorphous silicon film. Moreover, the formation mechanism of the micro-protrusions was linked to fluctuations of the solidliquid interface caused by continuous laser pulse shocks at higher repetition frequencies. The findings of this study suggest important correlations between the initial surface conditions and micro-/nano-structure formation, which may enhance our fundamental understanding of the formation of micro-/nano-structures. 2021 by the authors. Licensee MDPI, Basel, Switzerland.
DOI	10.3390/mi12070807
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收录类别	SCI ; EI
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65342
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Y. Ren and Z. Zhang. Influences of initial surface conditions on response characteristics of amorphous silicon films to nanosecond laser irradiation[J]. Micromachines,2021,12(7).
APA	Y. Ren and Z. Zhang.(2021).Influences of initial surface conditions on response characteristics of amorphous silicon films to nanosecond laser irradiation.Micromachines,12(7).
MLA	Y. Ren and Z. Zhang."Influences of initial surface conditions on response characteristics of amorphous silicon films to nanosecond laser irradiation".Micromachines 12.7(2021).

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