Modeling the time-dependent electron dynamics in dielectric materials induced by two-color femtosecond laser pulses: Applications to material modifications
| Autor: | E. O. Smetanina, Guillaume Duchateau, B. Chimier, P. González de Alaiza Martínez, Illia Thiele |
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| Přispěvatelé: | Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Photon Phonon Physics::Optics Electron Dielectric Thermal conduction Laser 01 natural sciences 010305 fluids & plasmas law.invention Impact ionization law 0103 physical sciences Femtosecond [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Physics::Atomic Physics Atomic physics 010306 general physics ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Physical Review A Physical Review A, American Physical Society 2021, 103 (3), ⟨10.1103/PhysRevA.103.033107⟩ Physical Review A, 2021, 103 (3), ⟨10.1103/PhysRevA.103.033107⟩ |
| ISSN: | 2469-9926 2469-9934 |
| DOI: | 10.1103/PhysRevA.103.033107⟩ |
| Popis: | Controlling the electron dynamics during laser-matter interactions is a key factor to control the energy deposition and subsequent material modifications induced by femtosecond laser pulses. One way to achieve this goal is to use two-color femtosecond laser pulses. In this paper, the electron dynamics in dielectric materials induced by two-color femtosecond laser pulses is studied by solving dedicated optical Bloch equations. This model includes photo- and impact ionization, the laser heating of conduction electrons, their recombination to the valence band, and their collisions with phonons. The influence of photon energies, laser intensities, and pulse-to-pulse delay is analyzed. Depending on the interaction process, colors cooperate to excite electrons or drive them independently. For the given laser parameters, an optimal pulse-to-pulse delay is found which enhances significantly the energy deposition into the material, in agreement with experimental observations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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