Numerical investigation of the enhanced unidirectional surface plasmon polaritons generator |
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| Authors: | Zhang Zhi-Dong Wang Hong-Yan Zhang Zhong-Yue Wang Hui |
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| Institution: | a School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;b School of Physics and Information Technology, Shaanxi Normal University, Xi’an 710062, China |
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| Abstract: | A unidirectional surface plasmon polaritons(SPPs) generator with greatly enhanced generation efficiency is proposed. The SPPs generator consists of an asymmetric single nanoslit coated with a polyviny alcohol(PVA) film and a silver rectangle block. The generation efficiency of this SPPs generator is investigated using the finite difference time domain method. Due to the presence of the silver rectangle block, the SPPs generation efficiency of the asymmetric single nanoslit with PVA film can be greatly enhanced and the corresponding wavelength with the maximum enhancement factor can be tuned flexibly. The influence of the structural parameters on the generation efficiency is also investigated for the enhanced unidirectional SPPs generator. |
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| Keywords: | surface plasmon polariton surface plasmon polaritons (SPPs) generator asymmetric single-slit finite difference time domain method |
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