论文标题
钻石中氮 - 呈中心合奏的光谱拓宽和超快速动力学
Spectral Broadening and Ultrafast Dynamics of a Nitrogen-Vacancy Center Ensemble in Diamond
论文作者
论文摘要
钻石中氮化中心（NV）中心的许多应用都取决于光谱狭窄且稳定的光学零孔子线转变。尽管已经证明了许多令人印象深刻的原理证明实验，但是在具有光谱属性的工程NV中心中仍有许多工作，对于实践实施而言非常强大。为了阐明其与环境相互作用的机制，我们将多维相干光谱应用于低温温度下的散装钻石中的NV中心合奏。我们的光谱揭示了由于准定位的振动模式以及Picsecond时尺度上的超快光谱扩散而引起的热量。通过外推到零温度，发现固有的，合奏平均的均相线宽在GHz范围内。我们还观察到与NV传感方案相关的激发态歧管的温度依赖性的Stark分裂。
Many applications of nitrogen-vacancy (NV) centers in diamond crucially rely on a spectrally narrow and stable optical zero-phonon line transition. Though many impressive proof-of-principle experiments have been demonstrated, much work remains in engineering NV centers with spectral properties that are sufficiently robust for practical implementation. To elucidate the mechanisms underlying their interactions with the environment, we apply multi-dimensional coherent spectroscopy to an NV center ensemble in bulk diamond at cryogenic temperatures. Our spectra reveal thermal dephasing due to quasi-localized vibrational modes as well as ultrafast spectral diffusion on the picosecond timescale. The intrinsic, ensemble-averaged homogeneous linewidth is found to be in the tens of GHz range by extrapolating to zero temperature. We also observe a temperature-dependent Stark splitting of the excited state manifold, relevant to NV sensing protocols.
