Noncollinear excitation of surface plasmons for triangular structure formation on Cr surfaces by femtosecond lasers

doi:10.1016/j.apsusc.2019.144932

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	Noncollinear excitation of surface plasmons for triangular structure formation on Cr surfaces by femtosecond lasers
	X. Zheng,B. Zhao,J. Yang,Y. Lei,T. Zou and C. Guo
刊名	Applied Surface Science
	2020
卷号	507 页码:10
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2019.144932
英文摘要	Utilizing double time-delayed femtosecond laser pulses with different linear polarizations, we achieve the regular subwavelength triangular structure arrays on chromium surfaces in one-step processing. Both measurement and characterization reveal that such surface structures are constituted by interlocking of three ablation gratings oriented along different directions. The comprehensive investigation of the structure formation is performed by varying laser parameters such as the energy ratio, the temporal delay and the polarization discrepancy between double pulses. It is found that the ratio of double laser energies is critical for the uniform triangular structure formation especially within a temporal delay range of -10 ps < Delta t < 10 ps. Unexpectedly, the triangular structures can still be generated even for the double laser pulses with non-orthogonal polarizations. In theory, apart from considering the transient change of the surface optical property induced by the first laser of double pulses, we also explore the noncollinear excitation of two surface plasmons for the temporally delayed incident laser pulse, which finally results in three differently oriented grating structures. The satisfactory explanation of the experimental phenomena validates our proposed model.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/64721]
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	X. Zheng,B. Zhao,J. Yang,Y. Lei,T. Zou and C. Guo. Noncollinear excitation of surface plasmons for triangular structure formation on Cr surfaces by femtosecond lasers[J]. Applied Surface Science,2020,507:10.
APA	X. Zheng,B. Zhao,J. Yang,Y. Lei,T. Zou and C. Guo.(2020).Noncollinear excitation of surface plasmons for triangular structure formation on Cr surfaces by femtosecond lasers.Applied Surface Science,507,10.
MLA	X. Zheng,B. Zhao,J. Yang,Y. Lei,T. Zou and C. Guo."Noncollinear excitation of surface plasmons for triangular structure formation on Cr surfaces by femtosecond lasers".Applied Surface Science 507(2020):10.