Optical and thermal processes involved in ultrafast laser pulse interaction with a field emitter

被引:18
作者
Gault, B. [1 ]
Vella, A. [1 ]
Vurpillot, F. [1 ]
Menand, A. [1 ]
Blavette, D. [1 ]
Deconihout, B. [1 ]
机构
[1] Inst Mat Rouen, Grp Phys Mat, UMR 6634, CNRS, F-76801 St Etienne, France
关键词
laser-assisted atom probe tomography; ultrafast laser-matter interaction; field evaporation; non-linear optical effects;
D O I
10.1016/j.ultramic.2007.02.004
中图分类号
TH742 [显微镜];
学科分类号
摘要
In the interaction between ultrafast laser pulses and a field emitter both optical and thermal processes are involved. In this paper, these physical process, and their timescales, are experimentally explored. Simple models are proposed to explain the observed experimental behaviour, and the influence of various parameters are investigated. In the case of optical processes, it is shown that the optical field is greatly enhanced at the tip apex, and that field evaporation could be induced by an optical non-linear effect called-optical rectification. In the case of thermal processes, it is shown that the temperature rise because of light absorption can be determined and that the cooling process of the tip surface can be studied by pump probe measurements. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:713 / 719
页数:7
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