First-principles electron dynamics control simulation of diamond under femtosecond laser pulse train irradiation |
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Authors: | Wang Cong Jiang Lan Wang Feng Li Xin Yuan Yanping Xiao Hai Tsai Hai-Lung Lu Yongfeng |
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Institution: | Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing?100081, People's Republic of China. |
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Abstract: | A real-time and real-space time-dependent density functional is applied to simulate the nonlinear electron-photon interactions during shaped femtosecond laser pulse train ablation of diamond. Effects of the key pulse train parameters such as the pulse separation, spatial/temporal pulse energy distribution and pulse number per train on the electron excitation and energy absorption are discussed. The calculations show that photon-electron interactions and transient localized electron dynamics can be controlled including photon absorption, electron excitation, electron density, and free electron distribution by the ultrafast laser pulse train. |
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