Institute of Analytical and Bioanalytical Chemistry, Ulm University, Germany.
Institute of Solid State Electronics, TU Wien, Austria.
Analyst. 2016 Oct 24;141(22):6202-6207. doi: 10.1039/c6an01130f.
This study shows the first combination of a ring-shaped vertically emitting quantum cascade laser (riQCL) providing two distinct emission wavelengths combined with a substrate-integrated hollow waveguide (iHWG). This ultra-compact riQCL-iHWG gas sensing device enables the simultaneous detection of two vapor phase species - here, furan and 2-methoxyethanol - providing distinctive absorption features at the emission wavelengths of the riQCL (i.e., 1144 and 1170 cm). Hence, multianalyte gas sensing via a unique mid-infrared (MIR) sensor concept is demonstrated.
本研究展示了首个环形垂直发射量子级联激光器（riQCL）与基底集成空芯波导（iHWG）相结合的组合，提供了两个独特的发射波长。这种超紧凑的 riQCL-iHWG 气体传感装置能够同时检测两种气相物质——呋喃和 2-甲氧基乙醇——在 riQCL 的发射波长处提供独特的吸收特征（即 1144 和 1170 cm）。因此，通过独特的中红外（MIR）传感器概念实现了多分析物气体传感。
