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Theory and modeling of laser-induced free-electron heating in wide-gap solids

机译:宽间隙固体中激光诱导的自由电子加热的理论与模型

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Abstract: A microscopic theory for the interaction of intense laser radiation at visible and near-infrared wavelengths with free electrons in a wide-band-gap solid is presented. We calculate the free-electron mediated energy transfer from the laser field to the solid and the electron-multiplication rate due to band-to- band ionization as a function of laser intensity at wavelengths in the range 250 nm $lambda $LS 10 $mu@m, using SiO$-2$/ as an example. The formalism is based on a Monte Carlo integration of the Boltzmann transport equation. The interaction of the laser radiation with the free electrons is treated both within the standard classical approximation and quantum mechanically using second-order perturbation theory. Steady state Monte Carlo results are used in rate equations to make a direct comparison to experimental laser-induced heating data. !13
机译:摘要:提出了在可见光和近红外波长的强激光辐射与宽带隙固体中的自由电子相互作用的微观理论。我们计算了在250 nm波长范围内从激光场到固体的自由电子介导的能量转移以及由于带间电离引起的电子倍增率与激光强度的函数关系。$ lambda $ LS 10 $ mu @m,以SiO $ -2 $ /为例。形式主义是基于Boltzmann输运方程的Monte Carlo积分。激光辐射与自由电子的相互作用在标准经典近似值和量子力学中均使用二阶扰动理论进行了处理。稳态Monte Carlo结果用于速率方程中,可以与实验激光诱导的加热数据进行直接比较。 !13

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