arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1705.08554physics.opticshep-phphysics.class-ph
收藏

梁模型及其傍轴近似

On beam models and their paraxial approximation

W. J. Waters, B. King

摘要:

我们导出了真空中电磁波方程的聚焦激光脉冲解。在再现了著名的傍轴高斯和轴棱锥情形下的光束和脉冲表达式后,我们应用该方法分析了具有洛伦兹横向动量分布的激光束。虽然近轴的方法有一些成功的焦轴附近和焦点的瑞利范围内,我们发现,它不正确地预测典型的洛伦兹的横向下降。我们的矢势方法特别适用于计算弱激光脉冲背景下的量子电动力学过程。

英文摘要:

We derive focused laser pulse solutions to the electromagnetic wave equation in vacuum. After reproducing beam and pulse expressions for the well-known paraxial Gaussian and axicon cases, we apply the method to analyse a laser beam with Lorentzian transverse momentum distribution. Whilst a paraxial approach has some success close to the focal axis and within a Rayleigh range of the focal spot, we find that it incorrectly predicts the transverse fall-off typical of a Lorentzian. Our vector-potential approach is particularly relevant to calculation of quantum electrodynamical processes in weak laser pulse backgrounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑