Surface Plasmon Polariton Enhancement in Silver Nanowire–Nanoantenna Structure |
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Authors: | Zheyu Fang Yanwei Lu Linran Fan Chenfang Lin Xing Zhu |
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Institution: | (1) School of Physics, State Key Laboratory for Mesoscopic Physics, Peking University, Beijing, 100871, China;(2) National Center for Nanoscience and Technology, Beijing, 100190, China; |
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Abstract: | The surface plasmon polariton (SPP) coupling and enhancement in silver nanowire–nanoantenna structure is proposed and simulated
by using finite difference time domain method. The results demonstrate that three-arm antenna can effectively enhance the
coupling efficiency at the incident end and the SPP field intensity at the emission end. The enhancement factor, which is
defined as the ratio of the SPP field intensity at the emission end with and without the three-arm antenna, for the various
antenna arm lengths and incident wavelengths under different incident angles are calculated. The suggested structure can be
served as an enhanced plasmonic waveguide for the nanophotonic and plasmonic circuits in the future. |
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