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arXiv 1107.4934physics.optics
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圆形光学纳米天线的解析理论

Circular Optical Nanoantennas: An Analytical Theory

Robert Filter, Jing Qi, Carsten Rockstuhl, Falk Lederer

摘要:

提出了一种完全解析的理论来描述由均匀圆盘叠层构成的光学纳米天线的谐振特性,即圆形贴片纳米天线。它包括在分析计算的相位积累的表面等离子体激元的谐振器和天线终端的复反射系数的额外贡献。这使得理论是独立的,不需要拟合参数。非常天线谐振,然后解释了一个简单的法布里-珀罗谐振器模型。预测相比,严格的模拟,并显示出良好的协议。使用这个分析模型,圆形天线可以通过改变堆叠的组成来调谐。

英文摘要:

An entirely analytical theory is provided for describing the resonance properties of optical nanoantennas made of a stack of homogeneous discs, i.e. circular patch nanoantennas. It consists in analytically calculating the phase accumulation of surface plasmon polaritons across the resonator and an additional contribution from the complex reflection coefficient at the antenna termination. This makes the theory self-contained with no need for fitting parameters. The very antenna resonances are then explained by a simple Fabry-Perot resonator model. Predictions are compared to rigorous simulations and show excellent agreement. Using this analytical model, circular antennas can be tuned by varying the composition of the stack.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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