@article{Proctor:2020:10.3390/photonics7040081,
author = {Proctor, M and Xiao, X and Craster, RV and Maier, SA and Giannini, V and Arroyo, Huidobro P},
doi = {10.3390/photonics7040081},
journal = {Photonics},
title = {Near- and far-field excitation of topological plasmonic metasurfaces},
url = {http://dx.doi.org/10.3390/photonics7040081},
volume = {7},
year = {2020}
}

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TY  - JOUR
AB  - The breathing honeycomb lattice hosts a topologically non-trivial bulk phase due to the crystalline-symmetry of the system. Pseudospin-dependent edge states, which emerge at the interface between trivial and non-trivial regions, can be used for the directional propagation of energy. Using the plasmonic metasurface as an example system, we probe these states in the near- and far-field using a semi-analytical model. We provide the conditions under which directionality was observed and show that it is source position dependent. By probing with circularly-polarised magnetic dipoles out of the plane, we first characterise modes along the interface in terms of the enhancement of source emissions due to the metasurface. We then excite from the far-field with non-zero orbital angular momentum beams. The position-dependent directionality holds true for all classical wave systems with a breathing honeycomb lattice. Our results show that a metasurfac,e in combination with a chiral two-dimensional material, could be used to guide light effectively on the nanoscale.
AU  - Proctor,M
AU  - Xiao,X
AU  - Craster,RV
AU  - Maier,SA
AU  - Giannini,V
AU  - Arroyo,Huidobro P
DO  - 10.3390/photonics7040081
PY  - 2020///
SN  - 2304-6732
TI  - Near- and far-field excitation of topological plasmonic metasurfaces
T2  - Photonics
UR  - http://dx.doi.org/10.3390/photonics7040081
UR  - http://hdl.handle.net/10044/1/85600
VL  - 7
ER  - 

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