空间兼容腔增强的六方氮化硼单光子产生
Space-compatible cavity-enhanced single-photon generation with hexagonal boron nitride
摘要：
纯净且不可分辨的单光子源对于不久的将来的光量子技术至关重要。最近，由二维六方氮化硼（hBN）主办的色心已经成为高亮度室温单光子源的一个有前途的平台。尽管发射器的亮度很高，但光谱相当宽，单光子纯度不足以用于实际的量子信息处理。在这里，我们报告这样的量子发射器托管hBN集成到一个可调光学微腔。$λ^3$量级的小模体积允许我们Purcell增强荧光，同时观察到激发态寿命缩短。该腔通过抑制非共振噪声，显著地窄化了光谱并提高了单光子纯度。我们通过评估我们的单光子源在量子密钥分发和量子计算中的性能来探索实际应用。完整的设备结构紧凑，并在皮类卫星平台上实现，使未来的低成本基于卫星的长距离量子网络成为可能。
英文摘要：
Sources of pure and indistinguishable single-photons are critical for near-future optical quantum technologies. Recently, color centers hosted by two-dimensional hexagonal boron nitride (hBN) have emerged as a promising platform for high luminosity room temperature single-photon sources. Despite the brightness of the emitters, the spectrum is rather broad and the single-photon purity is not sufficient for practical quantum information processing. Here, we report integration of such a quantum emitter hosted by hBN into a tunable optical microcavity. A small mode volume of the order of $λ^3$ allows us to Purcell enhance the fluorescence, with the observed excited state lifetime shortening. The cavity significantly narrows the spectrum and improves the single-photon purity by suppression of off-resonant noise. We explore practical applications by evaluating the performance of our single-photon source for quantum key distribution and quantum computing. The complete device is compact and implemented on a picoclass satellite platform, enabling future low-cost satellite-based long-distance quantum networks.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
