论文标题
使用单氮空位中心在钻石表面探测巡回载体动力学
Probing itinerant carrier dynamics at the diamond surface using single nitrogen vacancy centers
论文作者
论文摘要
钻石中的颜色中心被广泛探索，以用于量子传感，计算和网络中的应用。它们的光学，自旋和电荷特性已经进行了广泛的研究，而它们与巡回载体的相互作用相对尚未探索。在这里，我们表明，位于钻石表面10 nm以内的NV中心可以通过孔捕获转换为中性电荷状态。通过测量孔捕获速率，我们提取捕获横截面，该截面被与钻石表面的接近度所抑制。距离依赖性与载体扩散模型一致，表明即使在钻石表面，巡回载体寿命也可能很长。测量近地表NV中心的动力学为表征钻石表面和研究钻石设备中的电荷传输提供了一种新工具。
Color centers in diamond are widely explored for applications in quantum sensing, computing, and networking. Their optical, spin, and charge properties have been extensively studied, while their interactions with itinerant carriers are relatively unexplored. Here we show that NV centers situated within 10 nm of the diamond surface can be converted to the neutral charge state via hole capture. By measuring the hole capture rate, we extract the capture cross section, which is suppressed by proximity to the diamond surface. The distance dependence is consistent with a carrier diffusion model, indicating that the itinerant carrier lifetime can be long, even at the diamond surface. Measuring dynamics of near-surface NV centers offers a new tool for characterizing the diamond surface and investigating charge transport in diamond devices.
