Optically-detected NMR of optically-hyperpolarized 31P neutral donors in 28Si
Optically-detected NMR of optically-hyperpolarized 31P neutral donors in 28Si
复制标题
28Si 中光学超极化 31P 中性供体的光学检测 NMR
DOI：
10.1063/1.3577614
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发表时间：
2010
影响因子：
3.2
通讯作者：
H. Pohl
中科院分区：
文献类型：
--
作者：
M. Steger;T. Sekiguchi;A. Yang;K. Saeedi;M. Hayden;M. Thewalt;K. Itoh;H. Riemann;N. Abrosimov;P. Becker;H. Pohl
浅层供体31P的电子和核自旋是许多基于硅的量子计算方案中有前途的量子比特候选者。我们最近表明，在高同位素富集的28Si中，通过解决近间隙供体束缚激子跃迁中的供体超精细分裂，几乎消除了非均匀加宽，使得光学读出了供体电子和核自旋。我们还表明，在低磁场下，泵送这些相同的跃迁可以非常快地产生大的电子和核超极化，在那里，平衡电子和核极化非常小。在这里，我们展示了利用这种光学核超极化机制测量31P中性供体核磁共振参数的初步结果，用于制备31P核自旋体系，随后用核磁共振脉冲序列处理得到的核自旋居群的光学读数。这样就可以观测到单次核磁共振信号。
The electron and nuclear spins of the shallow donor 31P are promising qubit candidates invoked in many proposed Si-based quantum computing schemes. We have recently shown that the near-elimination of inhomogeneous broadening in highly isotopically enriched 28Si enables an optical readout of both the donor electron and nuclear spins by resolving the donor hyperfine splitting in the near-gap donor bound exciton transitions. We have also shown that pumping these same transitions can very quickly produce large electron and nuclear hyperpolarizations at low magnetic fields, where the equilibrium electron and nuclear polarizations are very small. Here we show preliminary results of the measurement of 31P neutral donor NMR parameters using this optical nuclear hyperpolarization mechanism for preparation of the 31P nuclear spin system, followed by optical readout of the resulting nuclear spin population after manipulation with NMR pulse sequences. This allows for the observation of single-shot NMR signals with ve...