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arXiv physics/0003058physics.optics
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时间反演衍射

Time-Reversed Diffraction

Max S. Zolotorev, Kirk T. McDonald

摘要:

我们表明,惠更斯-基尔霍夫衍射的时间反演公式可以用来推导高斯激光束的横向和纵向场,从一个简单的假设高斯光束分布在远场。将这种技术应用于赫兹偶极子的远场的尝试表明,衍射定律如何不允许波在无电荷区域中被聚焦到小于立方波长的体积。

英文摘要:

We show that a time-reversed formulation of Huygens-Kirchhoff diffraction can be used to deduce the transverse and longitudinal fields of a Gaussian laser beam, starting from a simple assumption of a Gaussian beam profile in the far field. An attempt to apply this technique to the far fields of a Hertzian dipole shows how the laws of diffraction do not permit a wave to be focused to a volume smaller than a cubic wavelength in a charge-free region.

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。

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