非线性平板内的方场振幅模和辐射强度不等效性
Squared-field amplitude modulus and radiation intensity nonequivalence within nonlinear slabs
摘要：
本文提出了一种新的方法，在法布里-珀罗框架内的波传播。指出时均坡印廷矢量模量与平方场振幅模量可以是不等价的。这一事实允许引入一种新的非线性介质，其非线性度与时间平均的坡印廷矢量模量成比例。它的透射率的计算和发现不同的克尔介质，其非线性成比例的平方场振幅模量得到的。后者强调了这些量值的不等价性。时空对称性分析表明，坡印亭非线性效应只可能存在于非中心对称材料中。
英文摘要：
This paper presents a novel approach to wave propagation inside the Fabry-Perot framework. It states that the time-averaged Poynting vector modulus could be nonequivalent with the squared-field amplitude modulus. This fact permits the introduction of a new kind of nonlinear medium whose nonlinearity is proportional to the time-averaged Poynting vector modulus. Its transmittance is calculated and found to differ with that obtained for the Kerr medium, whose nonlinearity is proportional to the squared-field amplitude modulus. The latter emphasizes the nonequivalence of these magnitudes. A space-time symmetry analysis shows that the Poynting nonlinearity should be only possible in noncentrosymmetric materials.
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