16 August 2000 Interaction of shock electromagnetic waves with absorbing media
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Proceedings Volume 4065, High-Power Laser Ablation III; (2000) https://doi.org/10.1117/12.407316
Event: High-Power Laser Ablation, 2000, Santa Fe, NM, United States
Abstract
There is considered influence of absorption on process of formation and evolution of shock electromagnetic wave (SHEW) in solids with different levels of absorption (dielectric, semiconductor, metal, plasma). Main aims of this work are (1) to show possibility of SHEW formation in absorbing materials, (2) to estimate value of absorption required for preventing formation of SHEW, (3) to study characteristic features of higher harmonic generation in transparent and absorbing materials during formation and propagation of SHEW. Analytical calculations and numerical modeling are based on full wave equation with specific terms describing plasma optical response, absorption and nonlinear dielectric response. Electromagnetic shock is shown to appear in absorbing materials with relatively low absorption but absorption changes dynamics of shock-wave front significantly as compared to the case of ideal nonabsorbing medium. Obtained results show abrupt increasing of threshold laser intensity required for formation of SHEW with increasing of absorption. If absorption exceeds certain level, formation of SHEW becomes impossible at reasonable laser intensity and focusing geometry.
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Anastasia S. Gruzdeva, Vitali E. Grudzev, "Interaction of shock electromagnetic waves with absorbing media", Proc. SPIE 4065, High-Power Laser Ablation III, (16 August 2000); doi: 10.1117/12.407316; https://doi.org/10.1117/12.407316
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