Efficient miniature circular polarization analyzer design using hybrid spiral plasmonic lens

Optics Letters
Weibin ChenQiwen Zhan

Abstract

The spin dependence of the focusing behavior of a spiral slot plasmonic lens can be utilized for a miniature circular polarization analyzer. However, the azimuthal polarization component of the incident circular polarization does not contribute to surface plasmon excitation and focusing because it is TE polarized with respect to the spiral slot. In this Letter, a hybrid metallic lens that consists of alternating spiral triangle array and spiral slot is designed to improve the plasmonic coupling efficiency. The spiral triangle array is responsible for coupling the azimuthal polarization component into surface plasmon. Numerical studies show that the field enhancement at the focus and power conversion efficiency can be increased by 39.53% and 94.69% compared to that of pure spiral slot plasmonic lens.

Citations

Jun 4, 2016·Scientific Reports·Hailong ZhouXinliang Zhang
Aug 27, 2016·Scientific Reports·Qingrui GuoXinhua Hu
Nov 23, 2017·Nanomaterials·Zhongyi GuoHongping Zhou
Jul 21, 2015·Optics Express·Jingran ZhangJun Gao
Dec 25, 2015·Optics Express·Jingran ZhangShutian Liu

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