Numerical investigation of the enhanced unidirectional surface plasmon polaritons generator

doi:10.1088/1674-1056/23/1/017801

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.

Keywords: surface plasmon polariton surface plasmon polaritons (SPPs) generator asymmetric single-slit finite difference time domain method

Received: 07 April 2013
Revised: 26 June 2013
Accepted manuscript online:

PACS:	78.68.+m	(Optical properties of surfaces)
	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11174237 and 10974161), the National Basic Research Program of China (Grant No. 2013CB328904), the Fundamental Research Funds for the Central Universities of Ministry of Education of China (Grant Nos. SWJTU12CX084 and SWJTU2010ZT06), and the Innovation Fund for Ph. D. Student of Southwest Jiaotong University, China.

Corresponding Authors: Wang Hong-Yan
E-mail: hongyanw@home.swjtu.edu.cn

Cite this article:

Zhang Zhi-Dong (张志东), Wang Hong-Yan (王红艳), Zhang Zhong-Yue (张中月), Wang Hui (王辉) Numerical investigation of the enhanced unidirectional surface plasmon polaritons generator 2014 Chin. Phys. B 23 017801

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