Photoelectric detection of electron spin resonance of nitrogen-vacancy centres in diamond.
Photoelectric detection of electron spin resonance of nitrogen-vacancy centres in diamond.
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DOI：
10.1038/ncomms9577
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发表时间：
2015-10-21
影响因子：
16.6
通讯作者：
Nesladek M
中科院分区：
文献类型：
--
作者：
Bourgeois E;Jarmola A;Siyushev P;Gulka M;Hruby J;Jelezko F;Budker D;Nesladek M
负电荷氮空位中心电子自旋的读出对于量子计算、计量学和传感方面的应用是至关重要的。传统的读出协议基于对氮空位中心发射的光子的检测，这一过程受到光子收集效率的限制。我们报告了一种检测氮空位中心磁共振的替代原理，允许在全金刚石器件中直接光电读出氮空位中心的自旋态。磁共振方案的光电流检测是基于对通过氮空位中心的双光子电离而促进到金刚石导带的电荷载流子的检测。通过同时执行两种类型的测量，对磁共振的光学和光电检测进行了比较。在共振微波频率下测量的光电流中的极小值归因于氮空位的自旋相关电离动力学，该电离动力学源于自旋选择性的非辐射跃迁到亚稳态的单重态。金刚石中的氮空位色心缺陷是量子比特的一种可能的宿主，但这种应用需要一种读出色心自旋态的方法。在这里，作者演示了这些色心的磁共振的光电读出技术。
The readout of negatively charged nitrogen-vacancy centre electron spins is essential for applications in quantum computation, metrology and sensing. Conventional readout protocols are based on the detection of photons emitted from nitrogen-vacancy centres, a process limited by the efficiency of photon collection. We report on an alternative principle for detecting the magnetic resonance of nitrogen-vacancy centres, allowing the direct photoelectric readout of nitrogen-vacancy centres spin state in an all-diamond device. The photocurrent detection of magnetic resonance scheme is based on the detection of charge carriers promoted to the conduction band of diamond by two-photon ionization of nitrogen-vacancy centres. The optical and photoelectric detection of magnetic resonance are compared, by performing both types of measurements simultaneously. The minima detected in the measured photocurrent at resonant microwave frequencies are attributed to the spin-dependent ionization dynamics of nitrogen-vacancy, originating from spin-selective non-radiative transitions to the metastable singlet state. Nitrogen-vacancy colour centre defects in diamond are one possible host for qubits, but such an application requires a method for reading out the colour centre spin state. Here, the authors demonstrate a photoelectric readout technique of the magnetic resonances of these colour centres.