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Fig. 7: Acoustic plasmons in graphene. | npj Metamaterials
The alternative text for this image may have been generated using AI.
a Schematic illustrating the acoustic graphene plasmon (APG) inside the layered structure69. b The z-component of the AGP electric field Ez, where the AFM tip couples to the AGP for the observation of APG mode. Reproduced with permission69. Copyright 2021 Springer Nature Limited.