Mid-Infrared Integrated Photonic Devices for Biomedical Sensing Applications

中红外吸收光谱是利用指纹吸收来检测未知样品分子特征的最广泛的技术。基于波导倏逝场的光谱学可以利用其吸收指纹在非常低的浓度下检测分析物，潜在地对各种化合物提供高灵敏度和选择性，而无需标记。用于生化分析的理想分子“指纹”区域主要是2微米- 13微米的中红外光谱区域。该项目将探索基于中红外波导的新型集成光子器件，并将有助于实现生物医学诊断应用的光子实验室片上平台。具体来说，这将涉及波导的制造和表征（使用新型中红外材料）和基于波导的器件，如环形谐振器、片上源和马赫-曾德尔干涉仪，以及它们的集成。该项目还将涉及其中一些器件的电磁建模，以优化性能和设计光子电路布局。

Mid-infrared absorption spectroscopy is the most widely used technique for detecting the molecular signatures of an unknown sample using their fingerprint absorption. Waveguide evanescent field based spectroscopy can detect analytes at very low concentrations using their absorption fingerprints, potentially offering high sensitivity and selectivity over a wide range of compounds without labelling.The ideal molecular "fingerprint" region for biochemical analysis is dominated by the Mid-IR spectral region from 2 micrometres - 13 micrometres. This project will explore novel Mid-IR waveguide based integrated photonic devices and will help realise photonic lab on-chip platform for biomedical diagnostic applications. Specifically this will involve the fabrication and characterisation of waveguides (using novel Mid-IR materials) and waveguide based devices such as ring resonators, on-chip sources and Mach-Zehnder interferometer, and their integration. The project will also involve electromagnetic modelling of some of these devices for optimising the performance and for designing photonic circuit layouts.