Space charge limited electron emission from a Cu surface under ultrashort pulsed laser irradiation
Space charge limited electron emission from a Cu surface under ultrashort pulsed laser irradiation
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DOI：
10.1063/1.3292581
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发表时间：
2010-02
影响因子：
4
通讯作者：
W. Wendelen;D. Autrique;A. Bogaerts
中科院分区：
文献类型：
--
作者：
W. Wendelen;D. Autrique;A. Bogaerts
在本研究中，利用一维粒子胞模型，研究了超短脉冲激光辐照下铜表面的电子发射。考虑了热电子发射和多光子光电子发射。发射的电子在目标上方产生负空间电荷;因此产生的电场将电子发射减少几个数量级。模拟表明，在研究超短脉冲激光照射金属时材料中与电子发射相关的现象时，应考虑空间电荷效应。
In this theoretical study, the electron emission from a copper surface under ultrashort pulsed laser irradiation is investigated using a one-dimensional particle in cell model. Thermionic emission as well as multiphoton photoelectron emission were taken into account. The emitted electrons create a negative space charge above the target; consequently the generated electric field reduces the electron emission by several orders of magnitude. The simulations indicate that the space charge effect should be considered when investigating electron emission related phenomena in materials under ultrashort pulsed laser irradiation of metals.