Remotely Pumped GHz Antibunched Emission from Single Exciton Centers in GaAs

Remotely Pumped GHz Antibunched Emission from Single Exciton Centers in GaAs
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GaAs 中单激子中心的远程泵浦 GHz 反聚束发射

DOI:
10.1021/acsphotonics.1c00094
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发表时间:
2021
期刊:
影响因子:
7
通讯作者:
P. V. Santos
P. V. Santos
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
M. Yuan;K. Biermann;S. Takada;C. Bäuerle;P. V. Santos

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量子通信网络需要单粒子的片上传输和操纵以及它们与单光子的相互转换以进行远程信息交换。由 GHz 表面声波 (SAW) 驱动的飞行激子是满足这些要求的出色信使。在这里,我们演示了对单个激子中心的声学操纵,该单个激子中心由与嵌入半导体量子阱中的浅杂质中心结合的单个激子组成。时间分辨光致发光研究表明,这些中心的发射强度和能量以 3.5 GHz 的 SAW 频率振荡。此外,这些中心可以通过沿着几微米的量子阱通道的飞行激子的声学传输来远程泵浦。时间相关性研究表明,这些中心发射反聚束光,从而充当在 GHz 频率下工作的单光子源。我们的研究结果为基于激子的按需操纵和具有自然光子界面的微波频率下单激子的片上传输铺平了道路。
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 impurity 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 antibunched 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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