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arXiv physics/0509112physics.optics
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菲涅耳方程与有源介质的refractive index

Fresnel equations and the refractive index of active media

Johannes Skaar

摘要:

存在一类可实现的有源介质,其折射率在复频率的上半平面中不能被定义为解析函数。对传统的基于解析性的折射率定义进行了修正,使其适用于一般的有源介质,并证明了相应的菲涅耳方程。在某些活动介质中,存在一个“向后”波,其中相速度和坡印廷矢量指向激发源,被证明。

英文摘要:

There exists a class of realizable, active media for which the refractive index cannot be defined as an analytic function in the upper half-plane of complex frequency. The conventional definition of the refractive index based on analyticity is modified such that it is valid for active media in general, and associated Fresnel equations are proved. In certain active media, the presence of a ``backward'' wave, for which both phase velocity and Poynting's vector point towards the excitation source, is demonstrated.

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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