Colour centres in hexagonal boron nitride as memory assisted single photon sources

六方氮化硼中的色心作为记忆辅助单光子源

• 批准号: 2606926
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2606926
• 关键词: Colour; centres; hexagonal; boron; nitride

Hexagonal boron nitride (hBN), a wide bandgap, two-dimensional material can host a number of colour centers that act as single photon sources. Remarkably, the emission linewidth for single defects is narrow bandwidth, even at room temperature and beyond. In the last two years, the potential for lifetime limited linewidths has been reported. This offers the tantalizing prospect of building room temperature coherent quantum light sources, versus incoherent single photon sources. A classical analogy would be a transition from light bulb to laser. Furthermore, there are a number of recent reports of microsecond scale spin coherence times for ensembles in hBN at room temperature, providing a memory resource for potential error correction.The main challenge is achieving optical and spin coherence on the single defect level. This project will study the optical coherence properties of single defects in hBN, which when combined with recent successes in optically detected magnetic resonance experiments probing the spin coherence, will better establish the potential of this material system for applications to quantum photonics. The project will incorporate the spin defects into tuneable microcavities to enhance emission and ultimately achieving indistinguishable photons.

六方氮化硼（hBN）是一种宽带隙的二维材料，可以容纳许多充当单光子源的色心。值得注意的是，即使在室温及更高温度下，单个缺陷的发射线宽也是窄带宽。在过去的两年中，已经报道了寿命有限线宽的潜力。这提供了诱人的前景建设室温相干量子光源，与非相干单光子源。一个经典的类比是从灯泡到激光的转变。此外，最近有许多关于室温下hBN系综的微秒尺度自旋相干时间的报道，为潜在的错误校正提供了存储资源。主要挑战是在单缺陷水平上实现光学和自旋相干。该项目将研究hBN中单个缺陷的光学相干特性，结合最近在光学检测磁共振实验中探测自旋相干性的成功，将更好地建立这种材料系统在量子光子学应用中的潜力。该项目将把自旋缺陷纳入可调微腔，以增强发射，并最终实现不可分辨的光子。