AI 中文总结
研究旨在解决半导体量子点在光子量子技术应用中面临的效率与噪声权衡问题，通过基于量子点嵌入p-i-n二极管圆形布拉格光栅谐振器的可调谐纳米光电器件，实现高效、可调谐的纠缠光子对和单光子发射，为半导体量子光子学提供可行平台。
AI 中文摘要
确定性的纠缠光子对和不可区分光子源有望在光子量子技术中发挥关键作用。半导体量子点因其按需发射及与纳米光子结构的兼容性而成为有前景的候选者。但当前实现面临提取效率、珀塞尔增强以及导致闪烁和降低不可区分性的电荷噪声之间的权衡。本文展示了一种基于嵌入p-i-n二极管圆形布拉格光栅谐振器中的量子点的可调谐纳米光电器件，提取效率高达0.55(6)，珀塞尔因子约为8。该器件产生波长可调的纠缠光子对，在1.6纳米范围内抑制闪烁且原始（校正）并发度>0.89(0.91)。同一光源还发射单光子，近乎傅里叶极限且高度不可区分，原始（校正）\(\mathcal{V}_{\text{HOM}}\)=0.951(4)(0.988(6))。这些结果证明了半导体量子光子学的可行平台。
英文摘要
Deterministic sources of entangled photon pairs and indistinguishable photons are expected to play a key role in photonic quantum technologies. Semiconductor quantum dots are promising candidates due to their on-demand emission and compatibility with nanophotonic structures. However, current implementations face trade-offs between extraction efficiency, Purcell enhancement, as well as charge noise that causes blinking and degrades indistinguishability. Here we demonstrate a tunable nano-optoelectronic device based on a quantum dot embedded in a p-i-n diode circular-Bragg-grating-resonator and featuring extraction efficiencies up to 0.55(6) and Purcell-factor of $\sim$8. The device generates wavelength-tunable entangled photon pairs with suppressed blinking and raw (corrected) concurrence > 0.89 (0.91) over a range of 1.6 nm. The very same source also emits single, nearly Fourier-limited and highly indistinguishable photons with raw (corrected) $\mathcal{V}_{\text{HOM}}$ = 0.951(4) (0.988(6)). These results demonstrate a viable platform for semiconductor quantum photonics.
