Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit

Xiaowei Li*, Qiaofeng Tan, Benfeng Bai, Guofan Jin

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

75 引用 (Scopus)

摘要

We demonstrate experimentally the directional excitation of surface plasmon polaritons (SPPs) on a metal film by a subwavelength double slit under backside illumination, based on the interference of SPPs generated by the two slits. By varying the incident angle, the SPPs can be tunably directed into two opposite propagating directions with a predetermined splitting ratio. Under certain incident angle, unidirectional SPP excitation can be achieved. This compact directional SPP coupler is potentially useful for many on-chip applications. As an example, we show the integration of the double-slit couplers with SPP Bragg mirrors, which can effectively realize selective coupling of SPPs into different ports in an integrated plasmonic chip.

源语言英语
文章编号251109
期刊Applied Physics Letters
98
25
DOI
出版状态已出版 - 20 6月 2011
已对外发布

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