2005/07/21 | 隐失波[Evanescent Wave]
类别(Ω〖物理〗) | 评论(0) | 阅读(137) | 发表于 19:57
An electromagnetic wave observed in total internal reflection, undersized waveguides, and in periodic dielectric heterostructures. While wave solutions have real wavenumbers k, k for an evanescent mode is purely imaginary. Evanescent modes are characterized by an exponential attenuation and lack of a phase shift.
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