Study on the Despeckle Methods in Angular Surface Plasmon Resonance Imaging Sensors

被引：0
作者：
Le Liu
Jun Guo
Yonghong He
Pengfei Zhang
Yilong Zhang
Jihua Guo
机构：
[1] Tsinghua University,Institute of Green Chemistry and Energy, Graduate School at Shenzhen
[2] Tsinghua University,Shenzhen Key Laboratory for Minimal Invasive Medical Technologies, Institute of Optical Imaging and Sensing, Graduate School at Shenzhen
[3] Tsinghua University,Department of Physics
来源：
Plasmonics | 2015年 / 10卷
关键词：
Surface plasmon resonance; Despeckle; Imaging; Noise;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The speckle effects caused by the coherence of the laser light sources have restricted the performances of angular surface plasmon resonance (SPR) imaging sensors, which are widely used due to their wide linear rage, high refractive index (RI) resolution, and simple structure. In this work, we experimentally studied the influence of two common despeckle methods (laser with a rotating diffuser and an incoherent light-emitting diodes (LED) light source) on the RI resolution of an angular SPR imaging sensor. We found that the LED light source with a band-pass filter could not only eliminate the speckle effect completely but also provide better RI resolution than the other despeckle method. This low-cost speckle-free method has the potential to promote the development and the industrialization of angular SPR imaging sensors.
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页码：729 / 737
页数：8
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