Simulation of thermionic emission optimization in femtosecond laser irradiation metal film by two-layer structure

被引：4
作者：
Guo, Jin [1 ]
Wang, Tingfeng [1 ]
Wang, Dinan [1 ]
Shao, Junfeng [1 ]
Chen, Anmin [2 ,3 ]
Jin, Mingxing [2 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Laser Interact Matter, Changchun 130033, Peoples R China
[2] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China
[3] Jilin Univ, Inst Theoret Chem, State Key Lab Theoret & Computat Chem, Changchun 130012, Peoples R China
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2014年 / 117卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
ELECTRON DYNAMICS; PULSE LASER; TEMPERATURE MEASUREMENT; THERMAL RELAXATION; MULTILAYER METALS; PHASE-CHANGE; GOLD TARGET; ABLATION; VACUUM; EXCITATION;
D O I：
10.1007/s00339-014-8557-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The thermionic emission of the single-layer gold thin film and the two-layer film was assembled by gold padded with other metals (Ag, Cu, and Ni) and irradiated by the femtosecond laser pulse. Additionally, the emission was simulated by a two-temperature model combined with the Richardson-Dushman equation. It was found that the two-layer metal structure can change the electron temperature of the gold surface and control the thermionic emission compared with the single-layer gold film. With the same laser fluence, the two-layer film structure may shorten the duration of thermionic emission, and the duration of the thermionic emission can be further optimized by changing the proportion of thin film thickness with gold layer in the two-layer structure. The result can be especially beneficial in the context of ultrafast electron emission induced by femtosecond laser.
引用
收藏
页码：1367 / 1374
页数：8
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