Liu Xiao-Jing, Wu Yun-Kun, Qi Xiao-Zhuo, Lu Liu, Li Ming, Zou Chang-Ling, Ren Shang-Yu, Guo Guo-Ping, Guo Guang-Can, Zhu Wenguang, Ren Xi-Feng
Key Laboratory of Quantum Information, CAS, University of Science and Technology of China, Hefei, 230026, China.
Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
Nano Lett. 2022 Mar 23;22(6):2244-2250. doi: 10.1021/acs.nanolett.1c04409. Epub 2022 Mar 11.
Single photon emitters (SPEs) are critical components of photon-based quantum technology. Recently, the interaction between surface plasmons and emitters has attracted increasing attention because of its potential to improve the quality of single-photon sources through stronger light-matter interactions. In this work, we use a hybrid plasmonic probe composed of a fiber taper and silver nanowire to controllably modulate the radiation properties of SPEs with differently oriented polarization. For out-of-plane oriented SPEs such as single CdSe quantum dots, the radiation lifetime could be reduced by a factor as large as seven; for in-plane oriented SPEs such as hBN defect SPEs, the average modulation amplitude varied from 0.69 to 1.23, depending on the position of the probe. The experimental results were highly consistent with the simulations and theory. This work provides an efficient approach for optimizing the properties of SPEs for quantum photonic integration.
单光子发射器（SPEs）是基于光子的量子技术的关键组件。近来，表面等离子体激元和发射器之间的相互作用因其通过更强的光与物质相互作用来提高单光子源质量的潜力而受到越来越多的关注。在这项工作中，我们使用由光纤锥和银纳米线组成的混合等离子体探针，以可控方式调制具有不同偏振方向的SPEs的辐射特性。对于诸如单个CdSe量子点之类的面外取向的SPEs，辐射寿命可降低多达七倍；对于诸如hBN缺陷SPEs之类的面内取向的SPEs，平均调制幅度根据探针的位置在0.69至1.23之间变化。实验结果与模拟和理论高度一致。这项工作为优化用于量子光子集成的SPEs的特性提供了一种有效方法。
