ZnSe中的光学活性单空穴自旋
Optically Active Single Hole Spin in ZnSe
AI总结：
通过光学激活ZnSe量子阱中的受主，实现单个空穴自旋的隔离与操控，并利用光谱和第一性原理模拟确认氮为最可能的受主杂质，为光学活性自旋量子比特和单光子源提供新平台。
AI中文摘要：
半导体空穴自旋通过解耦核磁噪声实现更长的相干时间，而其自旋-轨道耦合则支持快速全电控制。然而，在ZnSe中，实现这一潜力受到p型掺杂挑战的限制。在此，我们通过光学激活ZnSe量子阱中的受主来规避这一限制。我们隔离了一个束缚于浅受主的单空穴自旋，通过反聚束确认，并借助束缚激子的快速（244 ps）辐射复合进行访问。基态的磁光谱和拉曼光谱揭示有效空穴g因子为0.7，光学共振线宽为26.7 GHz。结合实验结果的第一性原理模拟提供了证据，表明氮是最可能的受主杂质。这些结果为ZnSe中的光学活性自旋量子比特和单光子源引入了一个有前景的新平台。
英文摘要：
Semiconductor hole spins offer a pathway to extended coherence times by decoupling from nuclear magnetic noise, while their spin-orbit coupling enables fast all-electrical control. In ZnSe, however, realizing this potential has been limited by p-doping challenges. Here, we circumvent this limit by optically activating acceptors within the ZnSe quantum well. We isolate a single-hole spin bound to a shallow acceptor, confirmed by antibunching and accessed via the fast (244 ps) radiative recombination of a bound exciton. Magnetic and Raman spectroscopy of the ground state reveal an effective hole g-factor of 0.7 and an optical resonance linewidth of 26.7 GHz. Complementary first-principles simulations, together with the experimental results, provide evidence that points toward nitrogen as the most likely acceptor impurity. These results introduce a promising new platform for optically active spin qubits and single-photon sources in ZnSe.
