Optoplasmonic hybrid structures composed of photonic and plasmonic elements with excellent optical properties are of great significance for the development of surface-enhanced Raman spectroscopy (SERS) substrates. In this work, the optoplasmonic hybrid structure is composed of SiO₂ microsphere and two-dimensional (2D) plasmonic- metal organic frameworks (MOF) film. Among them, the 2D plasmonic-MOF film is prepared from silver nanoparticles encapsulated by zeolitic imidazole acid framework (AgNP@ZIF-8) by self-assembly method. This optoplasmonic hybrid structure with gas adsorption properties could be used as a SERS substrate for 4-Mercaptophenol (4-MP) gas detection. Experimental data show that this substrate is dependent on the thickness of the ZIF shell and the size of the SiO₂ microspheres. In addition, it is confirmed by the electromagnetic field simulation of finite-difference time-domain method (FDTD). The optoplasmonic hybrid microstructures exhibit good uniformity for detection of 4-MP gas molecules. This work not only broadens the understanding of our optoplasmonic hybrid structure, but also has broad application prospects in SERS and gas sensing related fields.

由具有优异光学性能的光子和等离子体元件组成的光等离子体混合结构对于开发表面增强拉曼光谱（SERS）基板具有重要意义。在这项工作中，光等离子体混合结构由SiO ₂微球和二维（2D）等离子体-金属有机框架（MOF）薄膜组成。其中，二维等离子体-MOF薄膜是由沸石咪唑酸骨架（AgNP@ZIF-8）包覆的银纳米颗粒通过自组装法制备的。这种具有气体吸附特性的光等离子体杂化结构可用作 4-巯基苯酚 (4-MP) 气体检测的 SERS 底物。实验数据表明，这种衬底取决于 ZIF 壳的厚度和 SiO _2的大小微球。此外，还通过有限差分时域法（FDTD）的电磁场模拟得到了证实。光等离子体混合微结构对 4-MP 气体分子的检测表现出良好的均匀性。该工作不仅拓宽了我们对光等离子体杂化结构的理解，而且在SERS和气体传感相关领域具有广阔的应用前景。