Electrically Driven Site-Controlled Single Photon Source

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

doi:10.1021/acsphotonics.3c00097

Electrically Driven Site-Controlled Single Photon Source

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

Authors

Shi Guo¹, Savvas Germanis², Takashi Taniguchi³, Kenji Watanabe⁴, Freddie Withers¹, Isaac J Luxmoore²

Affiliations

¹ Department of Physics and Astronomy, University of Exeter, Exeter EX4 4QL, United Kingdom.
² Department of Engineering, University of Exeter, Exeter EX4 4QF, United Kingdom.
³ International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
⁴ Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.

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.