Appl Opt. 2022 Aug 10;61(23):6752-6760. doi: 10.1364/AO.465640.
This study optimizes a surface plasmon resonance (SPR) sensor based on - periodic grating using graphene and a hybrid structure to enhance sensitivity. The sensing performance was analyzed by wavelength modulation. By optimizing the structural parameters, we can obtain the quality factor and sensitivity of 90.192 and 960⋅. The periodic grating surface covered with prevents the oxidation of the silver layer and increases the adsorption of biomolecules. Compared with the conventional silver grating SPR sensor, the sensor's sensitivity and quality factor can be significantly enhanced. Experiments were carried out using sucrose solutions with different refractive indices, and the results indicate there was a good linear relationship between the resonance wavelength and the sucrose solution. The sensor has vast potential for practical applications.
本研究通过使用石墨烯和混合结构优化基于 - 周期光栅的表面等离子体共振（SPR）传感器，以提高灵敏度。通过波长调制分析了传感性能。通过优化结构参数，可以获得 90.192 和 960⋅ 的品质因数和灵敏度。周期性光栅表面覆盖的 防止银层氧化并增加生物分子的吸附。与传统的银光栅 SPR 传感器相比，传感器的灵敏度和品质因数可以得到显著提高。使用不同折射率的蔗糖溶液进行了实验，结果表明共振波长与蔗糖溶液之间存在良好的线性关系。该传感器具有广阔的实际应用潜力。
