论文标题
位置控制的电信单光子发射器在高温下运行
Position-controlled Telecom Single Photon Emitters Operating at Elevated Temperatures
论文作者
论文摘要
单个光子发射器是启用量子密钥分布协议用于安全通信的关键组件。对于长途光网络，必须在与标准单模式纤维兼容的波长下使用光子：1.31μm和1.55μm。我们使用确定性定位的INP光子波导纳米线在1.31μm处表现出高纯度单光子发射，其中包含单个INASP量子点 - A-A-ROD结构。在4 K时，在80 MHz的上带脉冲激发启动下，纤维中检测到的计数速率为1.9 mcps，对应于第一个光子收集效率，在25％的第一镜头。在此计数速率下，多光子发射的概率为g（2）（0）= 0.021。我们还评估了源的性能作为温度的函数。在77 K，220 K和300 K时，多光子的发射概率分别随温度而增加，其值分别为0.11、0.34和0.57，这归因于温度避开的激发激素发射线的重叠。这些结果是朝着在轻松的冷却要求下运行的电信单光子发射器迈出的有希望的一步。
Single photon emitters are a key component for enabling the practical use of quantum key distribution protocols for secure communications. For long-haul optical networks it is imperative to use photons at wavelengths that are compatible with standard single mode fibers: 1.31 μm and 1.55 μm. We demonstrate high purity single photon emission at 1.31 μm using deterministically positioned InP photonic waveguide nanowires containing single InAsP quantum dot-in-a-rod structures. At 4 K the detected count rate in fiber was 1.9 Mcps under above-band pulsed laser excitation at 80 MHz corresponding to a single photon collection efficiency at the first lens of 25%. At this count rate, the probability of multiphoton emission is g(2)(0) = 0.021. We have also evaluated the performance of the source as a function of temperature. Multiphoton emission probability increases with temperature with values of 0.11, 0.34 and 0.57 at 77 K, 220 K and 300 K, respectively, which is attributed to an overlap of temperature-broadened excitonic emission lines. These results are a promising step towards scalably fabricating telecom single photon emitters that operate under relaxed cooling requirements.
