Control of the hot electrons produced by laser interaction with nanolayered target

Hot electrons generated by short-pulse-laser interaction with nanolayered target (NT) are investigated using two-dimensional particle-in-cell simulation. Compared to the planar target, the NT leads to more efficient conversion of laser energy to the kinetic energy of the accelerated electrons. Howev...

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Bibliographic Details
Published in:Physics of plasmas 2010-10, Vol.17 (10)
Main Authors: Cao, Lihua, Gu, Yuqiu, Zhao, Zongqing, Cao, Leifeng, Huang, Wenzhong, Zhou, Weimin, Cai, H. B., He, X. T., Yu, Wei, Yu, M. Y.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
CONTROL
CONVERSION
EFFICIENCY
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY ABSORPTION
FERMIONS
KINETIC ENERGY
LASER-PRODUCED PLASMA
LEPTONS
PLASMA
PLASMA SIMULATION
SIMULATION
SORPTION
TWO-DIMENSIONAL CALCULATIONS
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Summary:Hot electrons generated by short-pulse-laser interaction with nanolayered target (NT) are investigated using two-dimensional particle-in-cell simulation. Compared to the planar target, the NT leads to more efficient conversion of laser energy to the kinetic energy of the accelerated electrons. However, the energy absorption by the NT decreases at both too-low and too-high laser intensities. At lower laser intensities it is because of the weaker electric and magnetic fields generated by the hot-electron jets and smaller relativistic skin depth. At higher laser intensities it is because of the damage or destruction of the layered structure by the laser field. On the other hand, the dependence of the conversion efficiency and hot-electron number on the duration of the (short) laser pulse and the nanolayer length is weak. Control of the hot-electron characteristics by tailoring the parameters of the laser and the NT is discussed.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.3481463