Characteristics of Polymer Waveguide Sensor Based on Local Surface Plasmon Resonance

LIU Sen-bo; FU Hao; LI Xiao-long; ZHANG Dan

doi:10.3788/fgxb20163701.0112

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Characteristics of Polymer Waveguide Sensor Based on Local Surface Plasmon Resonance

更新时间：2020-08-12

- Characteristics of Polymer Waveguide Sensor Based on Local Surface Plasmon Resonance
- Chinese Journal of Luminescence Vol. 37, Issue 1, Pages: 112-116(2016)
- 作者机构：
  
  厦门大学信息科学与技术学院,福建厦门,361000
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20163701.0112
  CLC： TB838.1
- Received：02 September 2015，
  
  Revised：10 October 2015，
  
  Published：10 January 2016
- 稿件说明：
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刘森波, 付浩, 李小龙等. 基于局域表面等离子体共振效应的聚合物波导传感器特性研究[J]. 发光学报, 2016,37(1): 112-116

LIU Sen-bo, FU Hao, LI Xiao-long etc. Characteristics of Polymer Waveguide Sensor Based on Local Surface Plasmon Resonance[J]. Chinese Journal of Luminescence, 2016,37(1): 112-116
刘森波, 付浩, 李小龙等. 基于局域表面等离子体共振效应的聚合物波导传感器特性研究[J]. 发光学报, 2016,37(1): 112-116 DOI： 10.3788/fgxb20163701.0112.

LIU Sen-bo, FU Hao, LI Xiao-long etc. Characteristics of Polymer Waveguide Sensor Based on Local Surface Plasmon Resonance[J]. Chinese Journal of Luminescence, 2016,37(1): 112-116 DOI： 10.3788/fgxb20163701.0112.

摘要

以SU-8光刻胶作为波导芯层材料

设计了基于金纳米粒子的局域表面等离子体共振(LSPR)波导传感器。根据Mie理论

建立了金纳米粒子的消光模型

理论分析了纳米粒子半径、待测物折射率等因素对局域表面等离子体共振曲线的影响。分析表明:当待测液体折射率增大时

LSPR共振峰的位置发生红移。随着金纳米粒子半径的逐渐增大

传感器灵敏度增加。共振吸收峰逐渐由单峰变为双峰

其中一个峰位于520 nm波长附近

主要由表面等离子体吸收造成;另一个峰随金纳米粒子半径的增大而逐渐红移

主要由表面等离子体散射造成。

Abstract

A SU-8 polymer waveguide sensor based on local surface plasmonresonance( LSPR ) was designed. The extinction model of Au nanoparticles was established. Influence of Au nanoparticle' radius and refractive index of analyte on LSPR curve was analysized. The theoretical analysis results show that the resonance wavelengths of LSPR sensor move to longwave direction when the refractive index of the analyte increases. With the increasing of Au nanoparticles' radius

the sensitivity increases and the resonance absorption peak gradually changes from one peak to two peaks. One of the peaks locates near 520 nm wavelength

mainly caused by surface plasmon absorption. Another peak which is caused by surface plasmon scattering

moves to longwave direction gradually with the increasing of Au nanoparticles' radius.

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Keywords

references

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State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

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