Broadband circular polarizer based on twisted plasmonic nano-disks

Zhang Mingdi; Lu Qieni; Xu Jie; Ge Baozhen

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Broadband circular polarizer based on twisted plasmonic nano-disks

机译：基于扭曲等离子体纳米盘的宽带圆偏振器

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The broadband circular polarizer based on the surface plasmon of a metal nanostructure has important practical application due to its adjustability, low cost, and easy integration. In this article, a twisted multilayer double semi-disc structure is designed to allow for a broadband circular polarizer, whose transmission spectra are simulated using the finite element method under left-handed circularly polarized and right-handed circularly polarized extinction. The results show a large extinction ratio up to 900 for properly designed geometry and a broad bandwidth (defined as extinction ratio > 10) of 50-160 nm. Additionally, the broadband position, bandwidth, and extinction rate are all sensitive to some geometric parameters, such as rotation angle, disk radius, and more, and the mechanism of this phenomenon is clarified by exploring the plasmon electromagnetic resonance on nanostructures. (C) 2019 Optical Society of America

机译：基于金属纳米结构的表面等离子体的宽带圆偏振器由于其可调节性，低成本和易于集成而具有重要的实际应用。在本文中，设计了一种扭曲的多层双半盘结构，允许宽带圆偏振器，其使用左手圆极化和右手圆偏振灭绝的有限元方法模拟透射光谱。该结果显示出适当设计的几何形状的大约900的大约900个，宽带宽（定义为消光比> 10），为50-160nm。另外，宽带位置，带宽和消光速率全部对一些几何参数敏感，例如旋转角度，盘半径等，并且通过探索纳米结构上的等离子体电磁共振来阐明这种现象的机制。（c）2019年光学学会

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来源
《Applied optics》 |2019年第18期|共7页
作者
Zhang Mingdi; Lu Qieni; Xu Jie; Ge Baozhen;
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作者单位

Tianjin Univ Sch Precis Instrument &

Optoelect Engn Tianjin 300072 Peoples R China;

Tianjin Univ Sch Precis Instrument &

Optoelect Engn Tianjin 300072 Peoples R China;

Tianjin Univ Sch Precis Instrument &

Optoelect Engn Tianjin 300072 Peoples R China;

Tianjin Univ Sch Precis Instrument &

Optoelect Engn Tianjin 300072 Peoples R China;

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Broadband circular polarizer based on twisted plasmonic nano-disks

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