Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, 10027, USA.
School of Electrical and Computer Engineering, Cornell University, Ithaca, NY, 14853, USA.
Nat Commun. 2018 May 14;9(1):1869. doi: 10.1038/s41467-018-04350-1.
The development of a spectroscopy device on a chip that could realize real-time fingerprinting with label-free and high-throughput detection of trace molecules represents one of the big challenges in sensing. Dual-comb spectroscopy (DCS) in the mid-infrared is a powerful technique offering high acquisition rates and signal-to-noise ratios through use of only a single detector with no moving parts. Here, we present a nanophotonic silicon-on-insulator platform designed for mid-infrared (mid-IR) DCS. A single continuous-wave low-power pump source generates two mutually coherent mode-locked frequency combs spanning from 2.6 to 4.1 μm in two silicon microresonators. A proof-of-principle experiment of vibrational absorption DCS in the liquid phase is achieved acquiring spectra of acetone spanning from 2900 to 3100 nm at 127-GHz (4.2-cm) resolution. These results represent a significant step towards a broadband, mid-IR spectroscopy instrument on a chip for liquid/condensed matter phase studies.
一种在芯片上的光谱仪的发展，该光谱仪能够实现实时无标记和高通量检测痕量分子的指纹图谱，这是传感领域的一大挑战。中红外双梳光谱学（DCS）是一种强大的技术，通过使用单个无运动部件的探测器即可实现高采集率和信噪比。在这里，我们提出了一种针对中红外（mid-IR）DCS 的纳米光子学硅片上绝缘体平台。单个连续波低功率泵浦源在两个硅微谐振器中产生两个相互相干的锁模频率梳，覆盖范围从 2.6 到 4.1μm。在液相中实现了振动吸收 DCS 的原理验证实验，在 127-GHz（4.2-cm）分辨率下获取了从 2900 到 3100nm 的丙酮光谱。这些结果代表了朝着用于液体/凝聚态物质相研究的芯片上宽带中红外光谱仪迈出的重要一步。
Zotero 插件
