Bright and Polarized Fiber In-Line Single-Photon Source Based on Plasmon-Enhanced Emission into Nanofiber Guided Modes
Bright and Polarized Fiber In-Line Single-Photon Source Based on Plasmon-Enhanced Emission into Nanofiber Guided Modes
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DOI：
10.1103/physrevapplied.19.034008
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发表时间：
2022-06
影响因子：
4.6
通讯作者：
K. M. Shafi;Ramachandrarao Yalla;K. P. Nayak
中科院分区：
文献类型：
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作者：
K. M. Shafi;Ramachandrarao Yalla;K. P. Nayak
我们展示了一个明亮的偏振光纤同轴单光子源的基础上，等离子体增强发射的胶体单量子点到一个光学晶体。我们发现，单量子点的发射特性可以强烈增强在单个金纳米棒的存在下，导致一个明亮的和强偏振的单光子发射。单光子有效地耦合到光纤的导模，并最终耦合到单模光纤。单光子源的亮度（光纤耦合光子计数率）估计为12.2（0.6）MHz，具有高单光子纯度（g2（0）= 0.20（0.04））和高达94- 97%的偏振度。该装置可以集成到光纤网络中，为量子网络中的潜在应用铺平了道路。
We demonstrate a bright and polarized fiber in-line single photon source based on plasmon-enhanced emission of colloidal single quantum dots into an optical nanofiber. We show that emission properties of single quantum dots can be strongly enhanced in the presence of single gold nanorods leading to a bright and strongly polarized single photon emission. The single photons are efficiently coupled to guided modes of the nanofiber and eventually to a single mode optical fiber. The brightness (fiber-coupled photon count rate) of the single photon source is estimated to be 12.2(0.6) MHz, with high single photon purity (g2(0) = 0.20(0.04)) and degree of polarization as high as 94-97%. The present device can be integrated into fiber networks paving the way for potential applications in quantum networks.