Electrical Control of Quantum Emitters in a Van der Waals Heterostructure

• URL: http://arxiv.org/abs/2111.02754v1
• Date: Thu, 4 Nov 2021 11:03:53 GMT
• Title: Electrical Control of Quantum Emitters in a Van der Waals Heterostructure
• Authors: Simon J. U. White, Tieshan Yang, Nikolai Dontschuk, Chi Li, Zai-Quan Xu, Mehran Kianinia, Alastair Stacey, Milos Toth, and Igor Aharonovich
• Abstract summary: We show an approach to electrically modulate quantum emitters in n hBN graphene van der Waals heterostructure. Notably, a significant number of quantum emitters are intrinsically dark, and become optically active at non-zero voltages. Our results enhance the potential of hBN for tuneable solid state quantum emitters for the growing field of quantum information science.
• Score: 2.239998253134085
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Controlling and manipulating individual quantum systems in solids underpins the growing interest in development of scalable quantum technologies. Recently, hexagonal boron nitride has garnered significant attention in quantum photonic applications due to its ability to host optically stable quantum emitters. However, the large band gap of hBN and the lack of efficient doping inhibits electrical triggering and limits opportunities to study electrical control of emitters. Here, we show an approach to electrically modulate quantum emitters in n hBN graphene van der Waals heterostructure. We show that quantum emitters in hBN can be reversibly activated and modulated by applying a bias across the device. Notably, a significant number of quantum emitters are intrinsically dark, and become optically active at non-zero voltages. To explain the results, we provide a heuristic electrostatic model of this unique behaviour. Finally, employing these devices we demonstrate a nearly coherent source with linewidths of 160 MHz. Our results enhance the potential of hBN for tuneable solid state quantum emitters for the growing field of quantum information science.

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