Metasurface-Enhanced Infrared Spectroscopy: An Abundance of Materials and Functionalities.
Metasurface-Enhanced Infrared Spectroscopy: An Abundance of Materials and Functionalities.
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超表面增强红外光谱：丰富的材料和功能。
DOI：
10.1002/adma.202110163
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Altug,Hatice
中科院分区：
文献类型：
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作者：
John-Herpin,Aurelian;Tittl,Andreas;Kühner,Lucca;Richter,Felix;Huang,StevenH;Shvets,Gennady;Oh,Sang-Hyun;Altug,Hatice
红外光谱通过解析其组成分子的特征吸收指纹，为生化系统的组成和动力学提供了独特的信息。基于这种固有的化学特异性和无标签、无创和实时检测的能力，红外光谱方法已经解锁了从环境监测和国防到化学分析和医疗诊断等领域的大量突破性应用。纳米光子学在突破传统远场光谱学的灵敏度限制方面发挥了至关重要的作用，利用共振纳米结构将入射光聚焦到电磁场的纳米级热点上，极大地增强了光与物质的相互作用。由这些谐振器的规则排列组成的超表面进一步增加了在光谱和空间上定制纳米级光控制的设计空间，这使它们成为表面增强光谱学的宝贵工具包。从超表面增强红外光谱的基本概念开始，展示了广泛的谐振器几何形状，材料和实现高灵敏度元器件的安排，特别关注新兴系统，如声子和二维范德华材料，以及与实验室芯片器件波导的集成。此外，基于超表面的红外光谱的先进传感器功能，包括多共振、可调性、介电泳、活细胞传感和机器学习辅助分析被强调。
Infrared spectroscopy provides unique information on the composition and dynamics of biochemical systems by resolving the characteristic absorption fingerprints of their constituent molecules. Based on this inherent chemical specificity and the capability for label‐free, noninvasive, and real‐time detection, infrared spectroscopy approaches have unlocked a plethora of breakthrough applications for fields ranging from environmental monitoring and defense to chemical analysis and medical diagnostics. Nanophotonics has played a crucial role for pushing the sensitivity limits of traditional far‐field spectroscopy by using resonant nanostructures to focus the incident light into nanoscale hot‐spots of the electromagnetic field, greatly enhancing light–matter interaction. Metasurfaces composed of regular arrangements of such resonators further increase the design space for tailoring this nanoscale light control both spectrally and spatially, which has established them as an invaluable toolkit for surface‐enhanced spectroscopy. Starting from the fundamental concepts of metasurface‐enhanced infrared spectroscopy, a broad palette of resonator geometries, materials, and arrangements for realizing highly sensitive metadevices is showcased, with a special focus on emerging systems such as phononic and 2D van der Waals materials, and integration with waveguides for lab‐on‐a‐chip devices. Furthermore, advanced sensor functionalities of metasurface‐based infrared spectroscopy, including multiresonance, tunability, dielectrophoresis, live cell sensing, and machine‐learning‐aided analysis are highlighted.