物质介质中光相干性的量子力学形式
Formalism of optical coherency in material media with a quantum mechanical treatment
摘要：
电磁场的涨落或无序运动是由统计性质而不是瞬时值来描述的。光场的这种统计描述是适用于可测量强度的斯托克斯-穆勒形式主义的基础。然而，光学相干性的基本概念，即通过波的干涉能力来评估，不能用这种形式主义来处理，因为它忽略了全局相位。在这项工作中，我们表明，使用与光学介质和量子力学波函数相关联的确定性矩阵状态之间的类比，可以构建一个一般的形式主义，该形式主义解释了非相干处理的平均相干效应所产生的附加项。该方法进一步推广了相干叠加的概念，描述了光介质的确定性态如何叠加产生另一个确定性介质态。我们的形式主义的相干性是用来研究相结合的极化响应的干扰等离子体纳米天线。
英文摘要：
The fluctuations or disordered motion of the electromagnetic fields are described by statistical properties rather than instantaneous values. This statistical description of the optical fields is underlying in the Stokes-Mueller formalism that applies to measurable intensities. However, the fundamental concept of optical coherence, that is assessed by the ability of waves to interfere, is not treatable by this formalism because it omits the global phase. In this work we show that, using an analogy between deterministic matrix states associated to optical media and quantum mechanical wavefunctions, it is possible to construct a general formalism that accounts for the additional terms resulting from the coherency effects that average out for incoherent treatments. This method generalizes further the concept of coherent superposition to describe how deterministic states of optical media can superpose to generate another deterministic media state. Our formalism of coherency is used to study the combined polarimetric response of interfering plasmonic nanoantennas.
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