Optically detected spin-mechanical resonance in silicon carbide membranes
Optically detected spin-mechanical resonance in silicon carbide membranes
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DOI：
10.1103/physrevb.100.094104
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发表时间：
2019-09-09
影响因子：
3.7
通讯作者：
Astakhov, G., V
中科院分区：
文献类型：
--
作者：
Poshakinskiy, A., V;Astakhov, G., V
混合自旋机械系统是未来量子技术的一个有前途的平台。通常，它们需要应用额外的微波场来将整数自旋投射到可读状态。我们发展了一个理论的光学检测与半整数自旋缺陷的碳化硅（SiC）膜的自旋机械共振。当自旋共振频率与机械模式的共振频率相匹配时，它会发生，从而通过共振增强的自旋声子耦合缩短自旋弛豫时间。这种效应可以被检测为在光泵浦下的光致发光强度的突然降低，而不施加微波场。我们提出了基于这种自旋机械共振的全光协议，以检测外部磁场和质量的灵敏度。我们还讨论了强光抽运下的室温非线性效应，包括自旋介导的机械模冷却和加热。我们的方法提出了使用自旋光力学的量子传感的概念。
Hybrid spin-mechanical systems are a promising platform for future quantum technologies. Usually they require the application of additional microwave fields to project integer spin to a readable state. We develop a theory of optically detected spin-mechanical resonance associated with half-integer spin defects in silicon carbide (SiC) membranes. It occurs when a spin resonance frequency matches a resonance frequency of a mechanical mode, resulting in a shortening of the spin-relaxation time through resonantly enhanced spinphonon coupling. The effect can be detected as an abrupt reduction of the photoluminescence intensity under optical pumping without application of microwave fields. We propose all-optical protocols based on such spin-mechanical resonance to detect external magnetic fields and mass with ultrahigh sensitivity. We also discuss room-temperature nonlinear effects under strong optical pumping, including spin-mediated cooling and heating of mechanical modes. Our approach suggests a concept for quantum sensing using spin-optomechanics.