Graphene-Based Long-Period Fiber Grating Surface Plasmon Resonance Sensor for High-Sensitivity Gas Sensing.
Graphene-Based Long-Period Fiber Grating Surface Plasmon Resonance Sensor for High-Sensitivity Gas Sensing.
复制标题
用于高灵敏度气体传感的石墨烯长周期光纤光栅表面等离子体共振传感器
DOI：
10.3390/s17010002
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发表时间：
2016-12-22
期刊：
影响因子：
--
通讯作者：
Zhu Y
中科院分区：
文献类型：
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作者：
Wei W;Nong J;Zhang G;Tang L;Jiang X;Chen N;Luo S;Lan G;Zhu Y
提出了一种基于石墨烯的长周期光纤光栅表面等离子体共振传感器。在LPFG SPR传感器的Ag膜表面涂覆单层石墨烯，增加了光纤表面的倏逝场强度，从而增强了SPR波与分子之间的相互作用。这些特征显著提高了传感器的灵敏度。实验结果表明，石墨烯基LPFG SPR传感器对甲烷的灵敏度可达0.344 nm%-1，相对于传统LPFG传感器和镀银LPFG SPR传感器分别提高了2.96倍和1.31倍。同时，基于石墨烯的长周期光纤光栅SPR传感器具有优异的响应特性和重复性。这样的SPR传感方案提供了一个有前途的平台，以实现高灵敏度的气体传感应用。
A graphene-based long-period fiber grating (LPFG) surface plasmon resonance (SPR) sensor is proposed. A monolayer of graphene is coated onto the Ag film surface of the LPFG SPR sensor, which increases the intensity of the evanescent field on the surface of the fiber and thereby enhances the interaction between the SPR wave and molecules. Such features significantly improve the sensitivity of the sensor. The experimental results demonstrate that the sensitivity of the graphene-based LPFG SPR sensor can reach 0.344 nm%−1 for methane, which is improved 2.96 and 1.31 times with respect to the traditional LPFG sensor and Ag-coated LPFG SPR sensor, respectively. Meanwhile, the graphene-based LPFG SPR sensor exhibits excellent response characteristics and repeatability. Such a SPR sensing scheme offers a promising platform to achieve high sensitivity for gas-sensing applications.