Frequency-Comb Based Double-Quantum Two-Dimensional Spectrum Identifies Collective Hyperfine Resonances in Atomic Vapor Induced by Dipole-Dipole Interactions
Frequency-Comb Based Double-Quantum Two-Dimensional Spectrum Identifies Collective Hyperfine Resonances in Atomic Vapor Induced by Dipole-Dipole Interactions
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DOI：
10.1103/physrevlett.120.233401
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发表时间：
2018-06-08
影响因子：
8.6
通讯作者：
Cundiff, Steven T.
中科院分区：
文献类型：
--
作者：
Lomsadze, Bachana;Cundiff, Steven T.
基于频率梳的多维相干谱是一种能够在短采集时间内实现高分辨率测量的新型光学方法。该方法的分辨率使多维相干光谱与具有窄共振的原子系统相关。我们使用双量子多维相干谱揭示了100℃时由偶极-偶极相互作用引起的Rb蒸气中的集体超精细共振。我们在双量子2D光谱中观察到倾斜和拉长的线形，这在多普勒加宽系统中从未报道过。细长的线条形状表明，信号主要来自相互作用的原子，它们的相对速度接近于零。
Frequency-comb based multidimensional coherent spectroscopy is a novel optical method that enables high-resolution measurement in a short acquisition time. The method's resolution makes multidimensional coherent spectroscopy relevant for atomic systems that have narrow resonances. We use double-quantum multidimensional coherent spectroscopy to reveal collective hyperfine resonances in rubidium vapor at 100 degrees C induced by dipole-dipole interactions. We observe tilted and elongated line shapes in the double-quantum 2D spectra, which have never been reported for Doppler-broadened systems. The elongated line shapes suggest that the signal is predominately from the interacting atoms that have a near zero relative velocity.