论文标题
六角硼硼化硼中共振激发量子发射器的光学降低
Optical repumping of resonantly excited quantum emitters in hexagonal boron nitride
论文作者
论文摘要
固态量子发射器的谐振激发可实现量子状态的相干控制和相干单光子的产生，这是可扩展的量子光子应用所必需的。但是，这些系统通常会衰减到一个或多个中间的黑暗状态或频谱跳跃，从而导致共振缺乏光子。在这里，我们提出了一种光学共振态方案，该方案使用弱的非共振激光来减少向黑暗状态的过渡，并从氮化硼（HBN）中的量子发射器（HBN）中增强光致发光。利用两射线调整方案，我们实现了HBN发射器的光学稳定共振荧光，并且与仅共振激发相比，按时间级数量级的总体上升。我们的结果对于HBN中的原子样缺陷作为量子光子应用的可靠构建块很重要。
Resonant excitation of solid-state quantum emitters enables coherent control of quantum states and generation of coherent single photons, which are required for scalable quantum photonics applications. However, these systems can often decay to one or more intermediate dark states or spectrally jump, resulting in the lack of photons on resonance. Here, we present an optical co-excitation scheme which uses a weak non-resonant laser to reduce transitions to a dark state and amplify the photoluminescence from quantum emitters in hexagonal boron nitride (hBN). Utilizing a two-laser repumping scheme, we achieve optically stable resonance fluorescence of hBN emitters and an overall increase of ON time by an order of magnitude compared to only resonant excitation. Our results are important for the deployment of atom-like defects in hBN as reliable building blocks for quantum photonic applications.
