Femtosecond laser fabrication of sub-diffraction nanoripples on wet Al surface in multi-filamentation regime: High optical harmonics effects?

被引：23
作者：
Ionin, A. A. [1 ]
Kudryashov, S. I. [1 ]
Makarov, S. V. [1 ]
Rudenko, A. A. [1 ]
Saltuganov, P. N. [1 ]
Seleznev, L. V. [1 ]
Sinitsyn, D. V. [1 ]
Sunchugasheva, E. S. [1 ]
机构：
[1] RAS, PN Lebedev Phys Inst, Moscow 119991, Russia
来源：
APPLIED SURFACE SCIENCE | 2014年 / 292卷
基金：
俄罗斯基础研究基金会;
关键词：
Wet aluminum; Sub-diffraction surface nanoripples; Femtosecond laser pulses; Supercritical peak powers for self-focusing; Multi-filamentation in water; High optical harmonics; ALUMINUM SURFACE; GENERATION; PULSES;
D O I：
10.1016/j.apsusc.2013.12.032
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Relief ripples with sub-diffraction periods (approximate to lambda(las)/3, lambda(las)/4) were produced on a aluminum surface immersed in water and irradiated in a multi-filamentation regime by focused 744 nm femtosecond laser pulses with highly supercritical, multi-GW peak powers. For the VUV (8.5 eV) surface plasmon resonance on the wet aluminum surface, such small-scale surface nanogratings can be produced by high - second and third - optical harmonics, coming to the surface from the optical filaments in the water layer. Then, the sub-diffraction surface ripples may appear through interference of their transverse electric fields with the longitudinal electric fields of their counterparts, scattered on the surface roughness and appeared as the corresponding high-energy, high-wavenumber surface polaritons. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：678 / 681
页数：4
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