GaAs中单个激子中心的远程泵浦GHz反聚束辐射
Remotely pumped GHz antibunched emission from single exciton centers in GaAs
摘要：
量子通信网络需要单粒子的片上传输和操纵，以及它们相互转换为单光子以进行远距离信息交换。由GHz表面声波（SAW）推动的飞行激子是满足这些要求的杰出信使。在这里，我们展示了声学操纵的单个激子中心组成的单个激子绑定到浅杂质中心嵌入在半导体量子阱。时间分辨的光致发光研究表明，从这些中心的发射强度和能量振荡的SAW频率为3.5 GHz。此外，这些中心可以通过飞行激子沿着量子阱通道在几微米内的声学传输来远程泵浦。时间相关研究表明，中心发射反聚束光，从而作为单光子源工作在GHz频率。我们的研究结果为基于激子的按需操作和单激子在微波频率下与自然光子界面的片上传输铺平了道路。
英文摘要：
Quantum communication networks require on-chip transfer and manipulation of single particles as well as their interconversion to single photons for long-range information exchange. Flying excitons propelled by GHz surface acoustic waves (SAWs) are outstanding messengers to fulfill these requirements. Here, we demonstrate the acoustic manipulation of single exciton centers consisting of individual excitons bound to shallow impurities centers embedded in a semiconductor quantum well. Time-resolved photoluminescence studies show that the emission intensity and energy from these centers oscillate at the SAW frequency of 3.5 GHz. Furthermore, these centers can be remotely pumped via acoustic transport of flying excitons along a quantum well channel over several microns. Time correlation studies reveal that the centers emit anti-bunched light, thus acting as single-photon sources operating at GHz frequencies. Our results pave the way for the exciton-based on-demand manipulation and on-chip transfer of single excitons at microwave frequencies with a natural photonic interface.
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