Electrically driven optical interferometry with spins in silicon carbide
Electrically driven optical interferometry with spins in silicon carbide
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DOI：
10.1126/sciadv.aay0527
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发表时间：
2019-11-01
期刊：
影响因子：
13.6
通讯作者：
Awschalom, David D.
中科院分区：
文献类型：
--
作者：
Miao, Kevin C.;Bourassa, Alexandre;Awschalom, David D.
将固态缺陷电子自旋连接到其他量子系统是一个持续的挑战。基态自旋与环境的弱耦合不仅使其具有优异的相干性，而且限制了所需的驱动场。然而，这些电子的激发态轨道可以与声子和电场表现出更强的耦合。在这里，我们展示了电驱动的相干量子干涉在商业上可用的4H碳化硅的单基取向空位的光学跃迁中。利用微波频率电场，相干驱动距离的激发态轨道，在共振光吸收光谱中诱导出朗道-齐纳-斯图克尔伯格干涉条纹。此外，我们发现基底距离的对称性使得光学和自旋子系统具有显著的相干性。这些特性使真空成为量子通信和混合系统应用的有力候选者，在这些应用中，同时控制光学和自旋自由度是至关重要的。
Interfacing solid-state defect electron spins to other quantum systems is an ongoing challenge. The ground-state spin's weak coupling to its environment not only bestows excellent coherence properties but also limits desired drive fields. The excited-state orbitals of these electrons, however, can exhibit stronger coupling to phononic and electric fields. Here, we demonstrate electrically driven coherent quantum interference in the optical transition of single, basally oriented divacancies in commercially available 4H silicon carbide. By applying microwave frequency electric fields, we coherently drive the divacancy's excited-state orbitals and induce Landau-Zener-Stuckelberg interference fringes in the resonant optical absorption spectrum. In addition, we find remarkably coherent optical and spin subsystems enabled by the basal divacancy's symmetry. These properties establish divacancies as strong candidates for quantum communication and hybrid system applications, where simultaneous control over optical and spin degrees of freedom is paramount.