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Tri-comb spectroscopy
Nature Photonics ( IF 35.0 ) Pub Date : 2018-10-22 , DOI: 10.1038/s41566-018-0267-4
Bachana Lomsadze , Brad C. Smith , Steven T. Cundiff

Multidimensional coherent spectroscopy (MDCS)1,2 is a powerful method that enables the measurement of homogeneous linewidths in inhomogenously broadened systems, many-body interactions and coupling between excited resonances, all of which are not simultaneously accessible by any other method. Current implementations of MDCS require a bulky apparatus and suffer from resolution and acquisition speed limitations that constrain their applications outside the laboratory3,4,5. Here, we propose and demonstrate an approach to nonlinear coherent spectroscopy that utilizes three slightly different repetition-rate frequency combs. Unlike traditional nonlinear methods, tri-comb spectroscopy uses only a single photodetector and no mechanical moving elements to enable faster acquisition times, while also providing comb resolution. As a proof of concept, a multidimensional coherent spectrum with comb cross-diagonal resolution is generated using only 365 ms of data. These improvements make MDCS relevant for systems with narrow resonances and it has the potential to be field deployable for chemical-sensing applications.



中文翻译:

三梳光谱

多维相干光谱法(MDCS)1,2是一种功能强大的方法,可以测量不均匀加宽的系统中的均匀线宽,多体相互作用以及激发共振之间的耦合,所有其他方法无法同时访问所有这些。MDCS的当前实施需要笨重的设备,并且存在分辨率和采集速度方面的局限性,从而限制了它们在实验室外的应用3,4,5。在这里,我们提出并演示了一种利用三个略有不同的重复率频率梳的非线性相干光谱学的方法。与传统的非线性方法不同,三梳状光谱仪仅使用单个光电探测器,不使用机械移动元件以实现更快的采集时间,同时还提供梳状分辨率。作为概念证明,仅使用365 ms的数据即可生成具有梳状交叉对角线分辨率的多维相干谱。这些改进使MDCS适用于共振较窄的系统,并且具有可现场部署用于化学传感应用的潜力。

更新日期:2018-12-10
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