通过烧孔去除交叉弛豫谱中的非均匀展宽
Removing inhomogeneous broadening in cross-relaxation spectra via hole burning
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中文总结 AI 辅助
研究基于金刚石NV中心的量子弛豫测量技术中，非均匀展宽限制交叉弛豫谱分辨率的问题，提出用烧孔技术，利用弱泵浦场耗尽特定NV中心，保留便利性与灵敏度，开辟高分辨率磁共振光谱新途径。
中文摘要 AI 辅助
基于金刚石中氮空位（NV）中心的量子弛豫测量技术是一种易于使用的技术，通过测量NV中心的纵向弛豫来检测磁噪声。由于对不完美自旋控制具有鲁棒性，它在化学和生物应用中受到青睐。通过调谐能级，NV弛豫测量可以检测其他自旋产生的磁噪声并通过交叉弛豫获得磁共振谱。然而，NV中心的非均匀展宽极大地限制了交叉弛豫谱的光谱分辨率。在这里，我们展示了一种烧孔技术来去除非均匀展宽。我们利用一个弱泵浦场在弛豫测量期间耗尽特定的NV中心，这些中心在交叉弛豫谱中贡献一个线宽窄得多的反向信号。我们的方法保留了NV弛豫测量的便利性和灵敏度，为复杂场景中的高分辨率磁共振光谱开辟了新途径。
英文摘要
Quantum relaxometry based on nitrogen-vacancy (NV) centers in diamond is an easy-to-use technique that detects magnetic noise by measuring the longitudinal relaxation of NV centers. It is favored in chemical and biological applications due to the robustness against imperfect spin control. By tuning the energy level, NV relaxometry can detect magnetic noise generated by other spins and obtain magnetic resonance spectra through cross relaxation. However, the inhomogeneous broadening of NV centers greatly limits the spectral resolution of cross-relaxation spectra. Here we demonstrate a hole-burning technique to remove the inhomogeneous broadening. We utilize a weak pump field to deplete specific NV centers during the relaxation measurement, which contribute a reverse signal in the cross-relaxation spectra with a much narrower linewidth. Our method retains the convenience and sensitivity of NV relaxometry, opening up new avenues for high-resolution magnetic resonance spectroscopy in complex scenarios.
