光声双频梳光谱技术
Photo-acoustic dual-frequency comb spectroscopy
AI总结：
本文提出光声双频梳光谱技术，将双频梳光谱的高精度、高速度与光声探测相结合，通过麦克风检测双梳吸收产生的声波干涉图，实现快速、灵敏的多物种分子分析。
摘要：
光声光谱（PAS）是气体、流体和固体最灵敏的非破坏性分析技术之一。它可在任意波长下实现无背景探测，并适用于微观甚至非透明样品。将PAS扩展到宽带波长覆盖是一种强有力的工具，但在不牺牲波长分辨率和采集速度的情况下实现这一扩展具有挑战性。在此，我们展示了双频梳光谱（DCS）无与伦比的精度、速度和波长覆盖能力可以与光声探测的优势相结合。双梳吸收在样品中产生声波干涉图，并由麦克风检测。作为示例，微弱的气体吸收特征被精确且快速地采样；长期相干平均进一步提高了灵敏度。这种光声双频梳光谱的新方法为在光的各个波长范围内进行快速、灵敏的多物种分子分析创造了前所未有的机会。
英文摘要：
Photo-acoustic spectroscopy (PAS) is one of the most sensitive non-destructive analysis techniques for gases, fluids and solids. It can operate background-free at any wavelength and is applicable to microscopic and even non-transparent samples. Extension of PAS to broadband wavelength coverage is a powerful tool, though challenging to implement without sacrifice of wavelength resolution and acquisition speed. Here, we show that the unmatched precision, speed and wavelength coverage of dual-frequency comb spectroscopy (DCS) can be combined with the advantages of photo-acoustic detection. Acoustic wave interferograms are generated in the sample by dual-comb absorption and detected by a microphone. As an example, weak gas absorption features are precisely and rapidly sampled; long-term coherent averaging further increases the sensitivity. This novel approach of photo-acoustic dual-frequency comb spectroscopy generates unprecedented opportunities for rapid and sensitive multi-species molecular analysis across all wavelengths of light.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
