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Transient localized electron dynamics simulation during femtosecond laser tunnel ionization of diamond
Authors:C Wang  L Jiang  F Wang  X Li  YP Yuan  LT Qu  YF Lu
Institution:1. Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Key Laboratory of Cluster Science, Ministry of Education, School of Chemistry, Beijing Institute of Technology, Beijing 100081, China;3. Department of Electrical Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0511, USA
Abstract:A real-time and real-space time-dependent density-functional theory (TDDFT) is applied to simulate the nonlinear electron–photon interactions during femtosecond laser processing of diamond when tunnel ionization dominates. The transient localized electron dynamics including the electron excitation, energy absorption and electron density evolution are described in this Letter. In addition, the relationships among average absorbed energy, Keldysh parameter and laser intensity are revealed when the laser frequency is fixed.
Keywords:Time-dependent density-functional theory  Tunnel ionization  Electron dynamics
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