论文标题
等离子体电磁辐射的WIGNER时间
Wigner time for electromagnetic radiation in plasma
论文作者
论文摘要
波浪隧道是一种有趣的现象，它涵盖了物理学的不同分支，从量子力学到经典的电动力学和光学。事实证明，Wigner（或相）时间是通过隧道制度中的潜在屏障或物质层来描述波传输的适当方法。在这里，我们通过分析和数值计算电磁辐射传播的Wigner时间，通过无损和有损等离子体的层。结果表明，等离子体频率是管理Wigner时间值的关键参数，使我们能够将隧道解释为由于等离子体的整体反应。我们分析了TE和TM极化的倾斜入射波的WIGNER时间，并讨论了在低频范围内出现的负Wigner时间的含义，并且接近等离子体频率。结果表明，等离子体值得关注作为隧道研究的视角对象。
Wave tunneling is an intriguing phenomenon spanning different branches of physics, from quantum mechanics to classical electrodynamics and optics. The Wigner (or phase) time is proved to be an adequate measure to describe wave transit through a potential barrier or material layer in the tunneling regime. Here, we analytically and numerically calculate the Wigner time for electromagnetic-radiation propagation through the layer of both lossless and lossy plasmas. It is shown that the plasma frequency is the key parameter governing the value of Wigner time allowing us to interpret tunneling as due to the reaction of plasma as a whole. We analyze the Wigner time for obliquely incident waves of TE and TM polarizations and discuss the meaning of negative Wigner times appearing in the lossy case in the low-frequency range and close to the plasma frequency. The results show that plasma deserves attention as a perspective object for tunneling studies.
