, Volume 12, Issue 5, pp 1425–1430 | Cite as

Efficient Unidirectional Launching of Surface Plasmons by Multi-Groove Structures



Efficiency is an important criterion in developing a practical surface-plasmon-polariton (SPP) unidirectional launcher. In this paper, we show that multi-groove structures can efficiently launch SPPs by numerically optimizing structural parameters and normal incident light. Experimentally, a high efficiency of 58.4 % is demonstrated in a six-groove structure with a lateral dimension of 3.9 μm. For a three-groove structure with even smaller lateral dimension of 1.35 μm, the efficiency presents a broadband response, which remains higher than 42 % from 720 to 860 nm. The proposed multi-groove structures with high SPP launching efficiency and small size exhibit potential in highly integrated plasmonic circuits.


Surface plasmons Unidirectional launcher and decoupler Launching efficiency Integrated optics devices 



This work was supported by the National Basic Research Program of China (Grant No. 2013CB328704) and the National Natural Science Foundation of China (Grant Nos. 61475002 and 61435001).


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.School of PhysicsPeking UniversityBeijingChina
  2. 2.State Key Laboratory for Mesoscopic PhysicsPeking UniversityBeijingChina

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