Alberti Sebastián, Datta Anurup, Jágerská Jana
Department of Physics and Technology, UiT the Arctic University of Norway, 9019 Tromsø, Norway.
Sensors (Basel). 2021 Oct 30;21(21):7224. doi: 10.3390/s21217224.
On-chip devices for absorption spectroscopy and Raman spectroscopy have been developing rapidly in the last few years, triggered by the growing availability of compact and affordable tunable lasers, detectors, and on-chip spectrometers. Material processing that is compatible with mass production has been proven to be capable of long low-loss waveguides of sophisticated designs, which are indispensable for high-light-analyte interactions. Sensitivity and selectivity have been further improved by the development of sorbent cladding. In this review, we discuss the latest advances and challenges in the field of waveguide-enhanced Raman spectroscopy (WERS) and waveguide infrared absorption spectroscopy (WIRAS). The development of integrated light sources and detectors toward miniaturization will be presented, together with the recent advances on waveguides and cladding to improve sensitivity. The latest reports on gas-sensing applications and main configurations for WERS and WIRAS will be described, and the most relevant figures of merit and limitations of different sensor realizations summarized.
在过去几年中，由于紧凑且价格合理的可调谐激光器、探测器和片上光谱仪越来越容易获得，用于吸收光谱和拉曼光谱的片上设备发展迅速。已证明与大规模生产兼容的材料加工能够制造出具有复杂设计的长低损耗波导，这对于高光与分析物相互作用是不可或缺的。吸附剂包层的发展进一步提高了灵敏度和选择性。在本综述中，我们讨论了波导增强拉曼光谱（WERS）和波导红外吸收光谱（WIRAS）领域的最新进展和挑战。将介绍朝着小型化发展的集成光源和探测器，以及波导和包层在提高灵敏度方面的最新进展。将描述关于气体传感应用的最新报告以及WERS和WIRAS的主要配置，并总结不同传感器实现方式的最相关的品质因数和局限性。
