Open AccessSymmetry breaking induced excitations of dark plasmonic modes in multilayer graphene ribbons
Author(s) -
Yunyun Dai,
A Chen,
Yuyu Xia,
Dezhuan Han,
X H Liu,
Lei Shi,
Jian Zi
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.020021
Subject(s) - graphene , plasmon , materials science , symmetry (geometry) , excited state , ribbon , symmetry breaking , optoelectronics , condensed matter physics , photonics , degrees of freedom (physics and chemistry) , optics , physics , nanotechnology , quantum mechanics , composite material , geometry , mathematics
Multilayer graphene can support multiple plasmon bands. If structured into graphene ribbons, they can support multiple localized plasmonic modes with interesting optical properties. However, not all such plasmonic modes can be excited directly due to the constrains of the structural symmetry. We show by numerical simulations that by breaking the symmetry all plasmonic modes can be excited. We discuss the general principles and properties of two-layer graphene ribbons and then extend to multilayer graphene ribbons. In multilayer graphene ribbons with different ribbon widths, a tunable broadband absorption can be attained due to the excitations of all plasmonic modes. Our results suggest that these symmetry-broken multilayer graphene ribbons could offer more degrees of freedom in designing photonic devices.