Coherence in ultrafast laser-induced periodic surface structures

CORC > 西安光学精密机械研究所 > 中国科学院西安光学精密机械研究所 > 瞬态光学技术国家重点实验室

	Coherence in ultrafast laser-induced periodic surface structures
	Zhang, Hao 1; Colombier, Jean-Philippe 1; Li, Chen1,2,3 ; Faure, Nicolas 1; Cheng, Guanghua2 ; Stoian, Razvan 1
刊名	physical review b
	2015-11-13
卷号	92 期号:17 页码:174109
ISSN号	1098-0121
通讯作者	zhang, h
产权排序	2
英文摘要	ultrafast laser irradiation can trigger anisotropically structured nanoscaled gratinglike arrangements of matter, the laser-induced periodic surface structures (lipsss). we demonstrate here that the formation of lipss is intrinsically related to the coherence of the laser field. employing several test materials that allow large optical excursions, we observe the effect of randomizing spatial phase in generating finite domains of ripples. using three-dimensional finite-difference time-domain methods, we evaluate energy deposition patterns below a material's rough surface and show that modulated pattern, i.e., a spatially ordered electromagnetic solution, results from the coherent superposition of waves. by separating the field scattered from a surface rough topography from the total field, the inhomogeneous energy absorption problem is reduced to a simple interference equation. we further distinguish the contribution of the scattered near field and scattered far field on various types of inhomogeneous energy absorption features. it is found that the inhomogeneous energy absorption which could trigger the low-spatial-frequency lipsss (lsfls) and high-spatial-frequency lipsss (hsfls) of periodicity lambda > lambda/re((n) over tilde) are due to coherent superposition between the scattered far field (propagation) and the refracted field, while hsfls of lambda > lambda/re((n) over tilde) are triggered by coherent superposition between the scattered near field (evanescent) and the refracted field. this is a general scenario that involves a topography-induced scattering phenomenon and stationary evanescent fields, being applied to two model case materials that exhibit large optical excursions upon excitation (w, si) and nonplasmonic to plasmonic transitions. we indicate the occurrence of a general light interference phenomenon that does not necessarily involve wavelike surface plasmonic excitation. finally, we discuss the role of interference field and scattered field on the enhancement of lipsss by simulating interpulse feedback effects and provide the electromagnetic origin of grooves (lambda > lambda) related to a feedback-driven topography evolution. those results strongly suggest the electromagnetic interpretation of lipsss in interplay with an evolving surface topography.
学科主题	physics, condensed matter
WOS标题词	science & technology ; physical sciences
类目[WOS]	physics, condensed matter
研究领域[WOS]	physics
关键词[WOS]	femtosecond laser ; pulses ; ablation ; ripples ; morphology ; silicon
收录类别	SCI
语种	英语
WOS记录号	WOS:000368094200001
内容类型	期刊论文
源URL	[http://ir.opt.ac.cn/handle/181661/27793]
专题	西安光学精密机械研究所_瞬态光学技术国家重点实验室
作者单位	1.Univ St Etienne, Univ Lyon, UMR CNRS 5516, Lab Hubert Curien, F-42000 St Etienne, France 2.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 10049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hao,Colombier, Jean-Philippe,Li, Chen,et al. Coherence in ultrafast laser-induced periodic surface structures[J]. physical review b,2015,92(17):174109.
APA	Zhang, Hao,Colombier, Jean-Philippe,Li, Chen,Faure, Nicolas,Cheng, Guanghua,&Stoian, Razvan.(2015).Coherence in ultrafast laser-induced periodic surface structures.physical review b,92(17),174109.
MLA	Zhang, Hao,et al."Coherence in ultrafast laser-induced periodic surface structures".physical review b 92.17(2015):174109.