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电驱动的位点控制单光子源

Electrically Driven Site-Controlled Single Photon Source.

作者信息

Guo Shi, Germanis Savvas, Taniguchi Takashi, Watanabe Kenji, Withers Freddie, Luxmoore Isaac J

机构信息

Department of Physics and Astronomy, University of Exeter, Exeter EX4 4QL, United Kingdom.

Department of Engineering, University of Exeter, Exeter EX4 4QF, United Kingdom.

出版信息

ACS Photonics. 2023 Jul 5;10(8):2549-2555. doi: 10.1021/acsphotonics.3c00097. eCollection 2023 Aug 16.

Abstract

Single photon sources are fundamental building blocks for quantum communication and computing technologies. In this work, we present a device geometry consisting of gold pillars embedded in a van der Waals heterostructure of graphene, hexagonal boron nitride, and tungsten diselenide. The gold pillars serve to both generate strain and inject charge carriers, allowing us to simultaneously demonstrate the positional control and electrical pumping of a single photon emitter. Moreover, increasing the thickness of the hexagonal boron nitride tunnel barriers restricts electroluminescence but enables electrical control of the emission energy of the site-controlled single photon emitters, with measured energy shifts reaching 40 meV.

摘要

单光子源是量子通信和计算技术的基本构建模块。在这项工作中,我们展示了一种器件结构,它由嵌入石墨烯、六方氮化硼和二硒化钨的范德华异质结构中的金柱组成。金柱既用于产生应变又用于注入电荷载流子,这使我们能够同时展示单个光子发射器的位置控制和电泵浦。此外,增加六方氮化硼隧道势垒的厚度会限制电致发光,但能够对位置控制的单个光子发射器的发射能量进行电控制,测量到的能量偏移达到40毫电子伏特。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/bd7c/10436352/cf579e199143/ph3c00097_0001.jpg

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