论文标题
克服速率方向权衡：室温Ultrabright量子光源
Overcoming the rate-directionality tradeoff: a room-temperature ultrabright quantum light source
论文作者
论文摘要
室温下确定性GHz率的单光子源将是各种量子应用的必要组成部分。但是，慢慢的内在衰减速率和典型量子发射器的全向发射都是实现这样一个目标的两个障碍，这些目标很难同时克服。在这里，我们使用杂种方法解决了这一挑战，该方法使用由负责增强速率的金纳米酮构建的复杂单片光子谐振器，以及用于发射方向性的圆形Bragg天线。可重复的过程将量子点准确地与天线包裹的纳米酮的尖端结合。结果，我们同时实现了20倍的排放率提高和创纪录的最高方向性，从而导致观察到的亮度提高到NA = 0.22（0.5）的亮度增加到580（120）。我们预测，这种微型片上设备可以达到接近2.3*10^8单个光子/秒的光子速率，从而在环境条件下实现量子技术的超快速轻质界面。
Deterministic GHz-rate single photon sources at room-temperature would be essential components for various quantum applications. However, both the slow intrinsic decay rate and the omnidirectional emission of typical quantum emitters are two obstacles towards achieving such a goal which are hard to overcome simultaneously. Here we solve this challenge by a hybrid approach, using a complex monolithic photonic resonator constructed of a gold nanocone responsible for the rate enhancement, and a circular Bragg antenna for emission directionality. A repeatable process accurately binds quantum dots to the tip of the antenna-embedded nanocone. As a result we achieve simultaneous 20-fold emission rate enhancement and record-high directionality leading to an increase in the observed brightness by a factor as large as 580 (120) into an NA = 0.22 (0.5). We project that such miniaturized on-chip devices can reach photon rates approaching 2.3*10^8 single photons/second thus enabling ultra-fast light-matter interfaces for quantum technologies at ambient conditions.
