Gate-tunable plasmons in mixed-dimensional van der Waals heterostructures

Sheng Wang (), SeokJae Yoo (), Sihan Zhao, Wenyu Zhao, Salman Kahn, Dingzhou Cui, Fanqi Wu, Lili Jiang, M. Iqbal Bakti Utama, Hongyuan Li, Shaowei Li, Alexander Zibrov, Emma Regan, Danqing Wang, Zuocheng Zhang, Kenji Watanabe, Takashi Taniguchi, Chongwu Zhou and Feng Wang ()
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Sheng Wang: University of California at Berkeley
SeokJae Yoo: University of California at Berkeley
Sihan Zhao: University of California at Berkeley
Wenyu Zhao: University of California at Berkeley
Salman Kahn: University of California at Berkeley
Dingzhou Cui: University of Southern California
Fanqi Wu: University of Southern California
Lili Jiang: University of California at Berkeley
M. Iqbal Bakti Utama: University of California at Berkeley
Hongyuan Li: University of California at Berkeley
Shaowei Li: University of California at Berkeley
Alexander Zibrov: University of California at Berkeley
Emma Regan: University of California at Berkeley
Danqing Wang: University of California at Berkeley
Zuocheng Zhang: University of California at Berkeley
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
Chongwu Zhou: University of Southern California
Feng Wang: University of California at Berkeley

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Surface plasmons, collective electromagnetic excitations coupled to conduction electron oscillations, enable the manipulation of light–matter interactions at the nanoscale. Plasmon dispersion of metallic structures depends sensitively on their dimensionality and has been intensively studied for fundamental physics as well as applied technologies. Here, we report possible evidence for gate-tunable hybrid plasmons from the dimensionally mixed coupling between one-dimensional (1D) carbon nanotubes and two-dimensional (2D) graphene. In contrast to the carrier density-independent 1D Luttinger liquid plasmons in bare metallic carbon nanotubes, plasmon wavelengths in the 1D-2D heterostructure are modulated by 75% via electrostatic gating while retaining the high figures of merit of 1D plasmons. We propose a theoretical model to describe the electromagnetic interaction between plasmons in nanotubes and graphene, suggesting plasmon hybridization as a possible origin for the observed large plasmon modulation. The mixed-dimensional plasmonic heterostructures may enable diverse designs of tunable plasmonic nanodevices.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25269-0

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DOI: 10.1038/s41467-021-25269-0

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