AN IMPROVED VIRTUAL MODE THEORY OF ATR EXPERIMENTS ON SURFACE-POLARITONS - APPLICATION TO LONG-RANGE SURFACE PLASMON-POLARITONS IN ASYMMETRIC LAYER STRUCTURES
AN IMPROVED VIRTUAL MODE THEORY OF ATR EXPERIMENTS ON SURFACE-POLARITONS - APPLICATION TO LONG-RANGE SURFACE PLASMON-POLARITONS IN ASYMMETRIC LAYER STRUCTURES
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DOI：
10.1002/pssb.2221430115
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发表时间：
1987-09-01
影响因子：
1.6
通讯作者：
HAUPT, R
中科院分区：
文献类型：
--
作者：
WENDLER, L;HAUPT, R
考虑耦合棱镜的存在，分析了非对称层状结构中表面极化激元，特别是长程表面等离子体激元（LRSP）的阻尼特性。计算衰减全反射（ATR）光谱的响应处理和虚拟模式处理都被使用。两种不同类型的虚拟模式进行了分析。其中之一描述的传播特性的表面极化激元的存在下，固有的和辐射阻尼。另一种模式描述了一个驱动场的表面极化激元，因此这种模式可以找到ATR实验的最佳条件。这两种模式进行了详细的研究和数值计算的结果以图形的形式。ATR结构的结果表明，在非对称嵌入银层的传播长度超过对称嵌入的值显着。
The damping properties of surface polaritons, especially long‐range surface plasmon‐polaritons (LRSP) in asymmetric layer structures are analyzed taking into account the presence of a coupling prism. Both, the response treatment to calculate attenuated‐total‐reflection (ATR) spectra and the virtual mode treatment are used. Two different types of virtual modes are analyzed. One of them describes the propagation properties of the surface polariton in the presence of both intrinsic and radiative damping. The other type describes a surface polariton with a driving field and hence this mode allows to find out the optimum conditions for the ATR experiment. These two modes are investigated in detail and the results of the numerical calculation are presented in graphical form. The results for the ATR configuration show that in asymmetric embedded silver layers the propagation length exceeds the value for the symmetric embedded one significantly.