基于带吸收介质表面缺陷光子晶体的高通量检测

High Throughput Detection Based on Surface Defect Photonic Crystal with Absorbing Medium

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-Hnchen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 with absorbing medium is proposed to achieve the high throughput detection of sample solution information combining the surface wave resonance theory and microwell plate technique.According to the layered transmission matrix method and the Goos-Hanchen theory,the refractive index sensing mechanism is analyzed and the theoretical model between the resonance angle and the refractive index change of the detected sample is proposed.Combining the microwell plate technique and the angle modulation method,the spectrum analysis for different detected samples in different sensing areas can be performed respectively in the same scanning period.The simulation results show that the change of the concentration for the detected sample can vary the resonant angle,which makes the shift of the resonant defect peak wavelength in the reflective spectrum.In addition,the simultaneous detection of multiple sample resolution information can be obtained by angle scanning in single period.The method can provide certain theoretical and technical references for the design of high throughput detection system.