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提出了一种带有吸收介质的表面缺陷光子晶体结构,将表面波谐振原理和微孔板技术相结合,实现了样本溶液信息的高通量检测。根据分层传输矩阵法和Goos-Hnchen理论分析其折射率传感机理,建立谐振角度与样本折射率变化的理论模型。结合微孔板和角度调制,在同一扫描周期中分别对不同传感区域的待测物实现光谱特性分析。结果表明,待测样本浓度变化将引起谐振角度的变化,进而使反射谱中的缺陷峰值波长产生漂移,并且单个周期角度扫描就可实现多个待测样本溶液信息的同时监测。该方法对高通量检测系统的设计具有一定的理论和技术参考价值。
A surface defect photonic crystal structure with absorbing medium was proposed. By combining the principle of surface wave resonance and microplate technique, high-throughput detection of sample solution information was realized. According to the hierarchical transmission matrix method and the Goos-Hönchen theory, the refractive index sensing mechanism is analyzed, and the theoretical model of the resonant angle and the refractive index change of the sample is established. Combined with microplate and angle modulation, the spectral characteristics of the analytes in different sensing regions were analyzed respectively in the same scanning cycle. The results show that the change of the sample concentration will cause the change of the resonance angle, and then the peak wavelength of the defect in the reflection spectrum will drift. And the single cycle angle scanning can realize the simultaneous monitoring of the solution information of multiple samples. The method has certain theoretical and technical reference value for the design of high-throughput detection system.