一维表面微扰对表面等离子体激元耦合的调制
Modulation of surface plasmon coupling-in by one-dimensional surface corrugation
摘要：
表面等离子体激元-极化激元在亚波长光学、光产生和非破坏性传感等方面的潜力引起了科学界的新兴趣。由于它们与金属表面的本质结合，它们不能被自由传播的光直接激发，因此光-等离子体激元耦合效率对于任何等离子体激元器件的成功变得至关重要。在这里，我们提出了一个全面的研究调制（增强或抑制），这种耦合效率的一维表面反射。我们的方法是基于简单的波干涉，使我们能够作出定量的预测，已被实验证实在近红外和电信范围。
英文摘要：
Surface plasmon-polaritons have recently attracted renewed interest in the scientific community for their potential in sub-wavelength optics, light generation and non-destructive sensing. Given that they cannot be directly excited by freely propagating light due to their intrinsical binding to the metal surface, the light-plasmon coupling efficiency becomes of crucial importance for the success of any plasmonic device. Here we present a comprehensive study on the modulation (enhancement or suppression) of such coupling efficiency by means of one-dimensional surface corrugation. Our approach is based on simple wave interference and enables us to make quantitative predictions which have been experimentally confirmed at both the near infra-red and telecom ranges.
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