Anomalous absorption and scattering of short-pulse high-intensity lasers in underdense plasmas.
Anomalous absorption and scattering of short-pulse high-intensity lasers in underdense plasmas.
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DOI：
10.1103/physrevlett.76.3332
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发表时间：
1996-04
影响因子：
8.6
通讯作者：
Tzeng;Môri;Decker
中科院分区：
文献类型：
--
作者：
Tzeng;Môri;Decker
用多维全显式粒子格子模拟方法研究了短脉冲激光在低密度等离子体[(1char2 1 4)%{n}{\mathm{cr}}]中的传输.模拟模型为80到600fs，1个波长脉冲在$1.5\ifmmode\times\else\texttimes\fi{}{10}^{17}$到$3.5\ifmmode\times\else\texttimes\fi{}{10}^{19}$的强度范围内W/c${\mathm{m}}^{2}$。给出了由于集体吸收损失和散射损失共同作用而导致焦锥能量损失的详细说明。给定脉冲长度的非线性传输损耗的优值系数是在瑞利长度内的拉曼前向散射指数。
The propagation of short-pulse lasers through several Rayleigh lengths of underdense plasma $[(1\char21{}4)%{n}_{\mathrm{cr}}]$ is studied using multidimensional fully explicit particle-in-cell simulations. The simulations model 80 to 600 fs, 1 \ensuremath{\mu}m wavelength pulses in the intensity range of $1.5\ifmmode\times\else\texttimes\fi{}{10}^{17}$ to $3.5\ifmmode\times\else\texttimes\fi{}{10}^{19}$ W/c${\mathrm{m}}^{2}$. A detailed account is given for the energy lost out of the focal cone due to a combination of collective absorption and scattering losses. The figure of merit for the nonlinear transmission losses of a given pulse length is the amount of Raman forward scattering exponentiation within a Rayleigh length.