论文标题
基于光学纳米纤维上的胶体单量子点的有效纤维在线单光子源
Efficient fiber in-line single photon source based on colloidal single quantum dots on an optical nanofiber
论文作者
论文摘要
我们基于沉积在光学纳米纤维上的胶体单量子点的混合系统，证明了一个纤维内部光子源，并冷却至低温温度（3.7 K）。我们表明，单个量子点的带电状态（TRION）表现出具有高量子效率，狭窄线宽（3 MEV FWHM）和快速衰减时间（$ 10.0 \ pm0.5 $ ns）的单个光子的光稳定发射。单个光子有效耦合到纳米纤维的引导模式，并最终与单个模式光纤。单个光子源的亮度（效率）估计为$ 16 \ pm2 \％$，最大光子计数速率为$ 1.6 \ pm0.2 $ MHz和高单个光子纯度（$ g^2（0）= 0.11 = 0.11 \ pm0.02 $）。该设备可以轻松地集成到量子网络中潜在应用的铺平道路上的光纤网络。
We demonstrate a fiber in-line single photon source based on a hybrid system of colloidal single quantum dots deposited on an optical nanofiber and cooled down to cryogenic temperature (3.7 K). We show that a charged state (trion) of the single quantum dot exhibits a photo-stable emission of single photons with high quantum efficiency, narrow linewidth (3 meV FWHM) and fast decay time ($10.0\pm0.5$ ns). The single photons are efficiently coupled to the guided modes of the nanofiber and eventually to a single mode optical fiber. The brightness (efficiency) of the single photon source is estimated to be $16\pm2\%$ with a maximum photon count rate of $1.6\pm0.2$ MHz and a high single photon purity ($g^2(0)=0.11\pm0.02$). The device can be easily integrated to the fiber networks paving the way for potential applications in quantum networks.
