Vibrational relaxation dynamics of the nitrogen-vacancy center in diamond
Vibrational relaxation dynamics of the nitrogen-vacancy center in diamond
复制标题
金刚石氮空位中心的振动弛豫动力学
DOI：
10.1103/physrevb.97.220302
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发表时间：
2018
影响因子：
3.7
通讯作者：
Loh Zhi Heng
中科院分区：
文献类型：
--
作者：
Ulbricht Ronald;Dong Shuo;Gali Adam;Meng Sheng;Loh Zhi Heng
我们采用光谱分辨光学泵浦探针光谱和激发态初始分子动力学 (ESAIMD) 模拟相结合来研究带负电氮空位 () 缺陷激发态的超快振动弛豫动力学。实验结果揭示了声子边带的振动弛豫，时间常数约为 50 fs，与 ESAIMD 模拟预测的 fs 结构平衡时间尺度非常一致。观察到的超快振动能量弛豫意味着由光激发到中心声子边带触发的动力学过程主要发生在该态的最低振动能级中。
We employ a combination of spectrally resolved optical pump-probe spectroscopy and excited-stateab initiomolecular dynamics (ESAIMD) simulations to study the ultrafast vibrational relaxation dynamics of theexcited state of negatively charged nitrogen vacancy () defects. The experimental results reveal vibrational relaxation in the phonon sideband with a time constant of approximately 50 fs, in excellent agreement with the-fs structural equilibration timescale predicted by ESAIMD simulations. The observed ultrafast vibrational energy relaxation implies that dynamical processes triggered by photoexcitation into the phonon sideband of thecenter occur primarily in the lowest vibronic level of thestate.