Publication
Title
Tuning quantum nonlocal effects in graphene plasmonics
Author
Abstract
The response of electron systems to electrodynamic fields that change rapidly in space is endowed by unique features, including an exquisite spatial nonlocality. This can reveal much about the materials' electronic structure that is invisible in standard probes that use gradually varying fields. Here, we use graphene plasmons, propagating at extremely slow velocities close to the electron Fermi velocity, to probe the nonlocal response of the graphene electron liquid. The near-field imaging experiments reveal a parameter-free match with the full quantum description of the massless Dirac electron gas, which involves three types of nonlocal quantum effects: single-particle velocity matching, interaction-enhanced Fermi velocity, and interaction-reduced compressibility. Our experimental approach can determine the full spatiotemporal response of an electron system.
Language
English
Source (journal)
Science / American Association for the Advancement of Science [Washington, D.C.] - Washington, D.C., 1880, currens
Publication
Washington, D.C. : American Association for the Advancement of Science , 2017
ISSN
0036-8075 [print]
1095-9203 [online]
DOI
10.1126/SCIENCE.AAN2735
Volume/pages
357 :6347 (2017) , p. 187-190
ISI
000405391700042
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
GRASP: Graphene-based single-photon nonlinear optical devices
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 17.08.2017
Last edited 09.10.2023
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