Experimental Demonstration of Surface Plasmon Polaritons Reflection and Transmission Effects
Experimental Demonstration of Surface Plasmon Polaritons Reflection and Transmission Effects
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DOI：
10.3390/s19214633
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Lei Zheng;U. Zywietz;A. Evlyukhin;B. Roth;L. Overmeyer;C. Reinhardt
中科院分区：
文献类型：
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作者：
Lei Zheng;U. Zywietz;A. Evlyukhin;B. Roth;L. Overmeyer;C. Reinhardt
提出了一种特殊的集成光子表面结构，该结构由置于金属衬底上的介质脊和介质块组成，用于研究表面等离子体激元（SPP）的反射和透射效应。一种称为显微镜投影光刻的制造方法用于制备的结构。泄漏辐射显微镜用于激发和观察表面等离子体激元（SPPs）。有人观察到，表面等离子体粒子的强度显着下降时，撞击到矩形介质块。尽管如此，从介质块发出的透射波总是可观察到的。在不同的SPP入射条件下，研究了反射波在两种边界（空气/介质和介质/空气）上的传播特性以及介质块内部的透射波传播特性。分析和实验研究了反射角和透射角随入射角的变化规律。计算结果与实验结果一致。一旦这些结构被功能化，我们的研究结果可能会在传感和分析方面产生新的应用。
Special integrated photonic surface structures composed of a dielectric semicircle ridge and a dielectric block placed on a metal substrate are proposed for the investigation of surface plasmon polariton (SPP) reflection and transmission effects. A fabrication method called microscope projection photolithography was employed for the preparation of the structures. Leakage radiation microscopy was applied for the excitation and observation of surface plasmon polaritons (SPPs). It was observed that SPPs exhibit a remarkable decrease in intensity when impinging onto the rectangular dielectric block. Nevertheless, the transmitted wave out of the dielectric block was always observable. The propagation behavior of both the reflected waves at two boundaries (air/dielectric and dielectric/air) and the transmitted wave inside the dielectric block were demonstrated for different SPP incident conditions. The variation of the angles of reflection and transmission with respect to the incident angle was analytically and experimentally investigated. An agreement between the calculated results and the experimental results was obtained. Our findings might allow for novel applications in sensing and analytics once the structures will be functionalized.