Zhang Zi-Huai, Stevenson Paul, Thiering Gergő, Rose Brendon C, Huang Ding, Edmonds Andrew M, Markham Matthew L, Lyon Stephen A, Gali Adam, de Leon Nathalie P
Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA.
Wigner Research Centre for Physics, P.O. Box 49, H-1525 Budapest, Hungary.
Phys Rev Lett. 2020 Dec 4;125(23):237402. doi: 10.1103/PhysRevLett.125.237402.
Neutral silicon vacancy (SiV^{0}) centers in diamond are promising candidates for quantum networks because of their excellent optical properties and long spin coherence times. However, spin-dependent fluorescence in such defects has been elusive due to poor understanding of the excited state fine structure and limited off-resonant spin polarization. Here we report the realization of optically detected magnetic resonance and coherent control of SiV^{0} centers at cryogenic temperatures, enabled by efficient optical spin polarization via previously unreported higher-lying excited states. We assign these states as bound exciton states using group theory and density functional theory. These bound exciton states enable new control schemes for SiV^{0} as well as other emerging defect systems.
由于具有优异的光学性质和较长的自旋相干时间，金刚石中的中性硅空位（SiV⁰）中心是量子网络的理想候选者。然而，由于对激发态精细结构的理解不足以及非共振自旋极化有限，此类缺陷中与自旋相关的荧光一直难以捉摸。在此，我们报告了在低温下实现对SiV⁰中心的光学检测磁共振和相干控制，这是通过经由先前未报道的高能激发态进行高效光学自旋极化实现的。我们使用群论和密度泛函理论将这些态指定为束缚激子态。这些束缚激子态为SiV⁰以及其他新兴缺陷系统带来了新的控制方案。
