Mainly driven by the recent dramatic progress of infrared technologies, as well as by the emerging methods for cooling of ground-state molecules, the field of precision molecular spectroscopy is experiencing a new youth, as it promises to lead major advances both in fundamental and applied science. The present review will encompass the main results obtained in the last two decades, by our group, in this scope, particularly in the mid infrared and THz spectral regions. Starting from the development of novel, metrological-grade coherent radiation sources, either in continuous-wave or in pulsed-emission regime, we will go through the realization of more an more sophisticated spectroscopic interrogation techniques. We will then conclude with the first demonstration of cavity-enhanced ro-vibrational spectroscopy on a buffer-gas-cooled molecular beam. From this brief overview it emerges that high-precision physical fundamental measurements can be done, at present, at an energy scale as low as the photons used for harnessing the molecular samples.

中文翻译：

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分子气体传感的前沿

受到近期红外技术的巨大进步以及基态分子冷却的新兴方法的推动，精密分子光谱学领域正迎来新的发展，因为它有望引领基础和应用领域的重大进步。科学。本综述将涵盖我们小组在过去二十年中在此范围内获得的主要结果，尤其是在中红外和太赫兹光谱范围内。从开发新的，计量级的相干辐射源开始，无论是连续波还是脉冲发射，我们将经历更复杂的光谱查询技术的实现。然后，我们将在缓冲气体冷却的分子束上进行腔增强旋转振动光谱的首次演示来结束。