Electric Field-Controlled Damping Switches of Coupled Dirac Plasmons

Huayang Zhang; Xiaodong Fan; Dongli Wang; Dongbo Zhang; Xiaoguang Li; Changgan Zeng

doi:10.1103/PhysRevLett.129.237402

Electric Field-Controlled Damping Switches of Coupled Dirac Plasmons

Phys Rev Lett. 2022 Dec 2;129(23):237402. doi: 10.1103/PhysRevLett.129.237402.

Authors

Huayang Zhang^{1

2

3}, Xiaodong Fan^{1

2

3}, Dongli Wang^{1

2

3}, Dongbo Zhang^{1

2

3}, Xiaoguang Li⁴, Changgan Zeng^{1

2

3}

Affiliations

¹ CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.
² International Center for Quantum Design of Functional Materials (ICQD), Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.
³ Hefei National Laboratory, University of Science and Technology of China, Hefei, Anhui 230088, China.
⁴ Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong 518060, China.

PMID: 36563194
DOI: 10.1103/PhysRevLett.129.237402

Abstract

For quasiparticle systems, the control of the quasiparticle lifetime is an important goal, determining whether the related fascinating physics can be revealed in fundamental research and utilized in practical applications. Here, we use double-layer graphene with a boron nitride spacer as a model system to demonstrate that the lifetime of coupled Dirac plasmons can be remotely tuned by electric field-controlled damping pathways. Essentially, one of the graphene layers serves as an external damping amplifier whose efficiency can be controlled by the corresponding doping level. Through this damping switch, the damping rate of the plasmon can be actively tuned up to 1.7 fold. This Letter provides a prototype design to actively control the lifetime of graphene plasmons and also broadens our horizon for the damping control of other quasiparticle systems.