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V形开口纳米银圆管阵列的透射特性及其传感性能的数值研究

Numerical Study on the Transmission Properties and Sensing Performance of a Periodic Array of V-Type Opened Silver Tubes

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摘要

提出了一种具有V 形开口的三维纳米银圆管阵列结构,这种结构可被应用于折射率传感器中。利用时域有限差分法对V 形开口纳米银圆管阵列的透射特性进行研究。结果表明:当入射光的电场偏振方向垂直于开口的方向时,在可见光和近红外波段的透射光谱上存在3 个共振透射峰,分别对应着一个传导型表面等离子体共振(PSPR)模式和两个不同机理的局域表面等离子体共振(LSPR)模式。讨论了阵列周期、圆管直径、圆管高度和圆管顶部缝隙大小等参数对透射峰的波长以及半峰全宽(FWHM)的影响。通过调谐结构参数,优化V 形开口纳米银圆管阵列的LSPR 传感性能,得到最大高达13.2 的品质因子。

Abstract

A periodic array of V-type opened silver tubes is proposed to serve as a refractive index sensor. The transmission properties of this structure are investigated via the finite-difference time domain method. Simulation results show that the transmission spectra of this structure have three tunable peaks when the electric field of the incident light is perpendicular to the gap. The peaks are induced by the propagating surface plasmon resonance (PSPR) at the silver-quartz interface and two different localized surface plasmon resonances (LSPR), respectively. The influences of structure parameters, such as array period, the tube diameter, height and gap width, on the transmission peak wavelength and full-width at half-maximun (FWHM) are analyzed By optimizing the structure, it can serve as a LSPR sensor with a figure of merit of 13.2.

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中图分类号:O539

DOI:10.3788/lop52.052402

所属栏目:表面光学

责任编辑:张雁

基金项目:国家自然科学基金(11374376,11174374)、广东省教育厅重点创新项目(2012CXZD0001)

收稿日期:2014-11-04

修改稿日期:2014-12-03

网络出版日期:2015-05-07

作者单位    点击查看

林世杰:中山大学物理科学与工程技术学院, 光电材料与技术国家重点实验室, 广东 广州 510275
沈杨:中山大学物理科学与工程技术学院, 光电材料与技术国家重点实验室, 广东 广州 510275
金崇君:中山大学物理科学与工程技术学院, 光电材料与技术国家重点实验室, 广东 广州 510275

联系人作者:林世杰(linshij2@mail2.sysu.edu.cn)

备注:林世杰(1989—),男,硕士研究生,主要从事表面等离子体微纳结构方面的研究。

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引用该论文

Lin Shijie,Shen Yang,Jin Chongjun. Numerical Study on the Transmission Properties and Sensing Performance of a Periodic Array of V-Type Opened Silver Tubes[J]. Laser & Optoelectronics Progress, 2015, 52(5): 052402

林世杰,沈杨,金崇君. V形开口纳米银圆管阵列的透射特性及其传感性能的数值研究[J]. 激光与光电子学进展, 2015, 52(5): 052402

被引情况

【1】张明,吕靖薇,刘昭廷,杨琳,柴雅婷,汪发美. 银纳米球阵列的表面等离子体共振特性. 激光与光电子学进展, 2016, 53(8): 81601--1

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