Dipole radiation in a multilayer geometry.
Dipole radiation in a multilayer geometry.
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多层几何结构中的偶极子辐射。
DOI：
10.1103/physrevb.36.4990
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Ushioda
中科院分区：
文献类型：
--
作者：
Reed;Giergiel;Hemminger;Ushioda
有几种实验可以用电介质的多层堆叠来完成，这些实验需要理解堆叠内的源的光发射以用于它们的分析。这些实验可能涉及，例如，发光隧道结，拉曼散射在Kretschmann和其他多层几何形状，和瑞利散射少量的表面或界面粗糙度，无论是单独或与其他过程相结合。提出了一组各向同性介质多层叠层的电磁绿色函数。L.米尔斯和A. a. Maradudin，Phys.Rev.B 12，2943（1975））给出了由以频率f振荡的电流点源在各处产生的电场。这些绿色的功能，因此可以用来解决这类问题。在本文中，我们将展示如何这些绿色的功能可以写在2 × 2的传输矩阵的类型通常用于找到在介质堆中的字段由于入射平面波。通过这种简化，我们可以很容易地评估任意层数的堆栈的绿色函数。我们进一步表明，当由堆栈内的点源产生的电场被评估得更远时，它们可以直接用从观察点的方向入射的平面波在电流源的位置处产生的电场来写。我们表明，这是从洛伦兹互易定理。因此，在这种情况下，不需要绿色函数的形式。«少
There are several kinds of experiments that can be done with multilayer stacks of dielectric media which require an understanding of light emission by sources within the stack for their analysis. These experiments may involve, for example, light-emitting tunnel junctions, Raman scattering in Kretschmann and other multilayered geometries, and Rayleigh scattering by small amounts of surface or interface roughness, either alone or in combination with other processes. A set of electromagnetic Green's functions for a multilayer stack of isotropic dielectric media (D. L. Mills and A. A. Maradudin, Phys. Rev. B 12, 2943 (1975)) gives the electric fields produced everywhere by a point source of current oscillating at a frequency f. These Green's functions can thus be used to solve this type of problem. In this paper we show how these Green's functions can be written in terms of 2 x 2 transfer matrices of the type commonly used to find the fields in a dielectric stack due to an incident plane wave. With this simplification we can easily evaluate the Green's functions for a stack with an arbitrary number of layers. We further show that, when the electric fields generated by a point source within the stack are evaluatedmore » far away, they can be written directly in terms of the electric fields that would be generated at the location of the current source by plane waves incident from the direction of the observation point. We show that this follows from the Lorentz reciprocity theorem. Thus, in this case the formalism of Green's functions is not needed.« less