dc.contributor.author | Barr, LE | |
dc.contributor.author | Horsley, SAR | |
dc.contributor.author | Hooper, IR | |
dc.contributor.author | Eager, JK | |
dc.contributor.author | Gallagher, CP | |
dc.contributor.author | Hornett, SM | |
dc.contributor.author | Hibbins, AP | |
dc.contributor.author | Hendry, E | |
dc.date.accessioned | 2018-06-18T15:09:22Z | |
dc.date.issued | 2018-04-18 | |
dc.description.abstract | In recent years, there have been reports of enhanced chiroptical interactions in the near-fields of antennas, postulated to be mediated by high spatial gradients in the electromagnetic fields. Here, using gigahertz experimentation, we investigate the nature of the chiral near-field generated by an array of staggered-rod antennas through its interaction with an array of aligned, subwavelength metallic helices. This allows us to eliminate many potential origins of enhancements, such as those associated with plasmon-exciton interactions, and search solely for enhancements due to the high spatial gradients in the chirality of the fields around chiral antennas (so-called 'superchiral fields'). By comparing the strength of the chiral interaction with our helices to that of a homogeneous chiral layer with effective material parameters, we find that the strength of this chiral interaction can be predicted using a completely local effective medium approximation. This suggests no obvious enhancement in the chiral interaction in the near-field and indicates that nonlocal interactions are negligible in this system. | en_GB |
dc.description.sponsorship | L.E.B., I.R.H., C.P.G., and A.P.H. wish to acknowledge
financial support form the Engineering and Physical Sciences
Research Council (EPSRC) of the United Kingdom, via the EPSRC
Centre for Doctoral Training in Metamaterials (Grant No.
EP/L015331/1). C.P.G. also wishes to acknowledge support
from Defense Science and Technology Laboratory (DSTL).
S.A.R.H. acknowledges financial support from the Royal
Society and TATA (RPG-2016-186). E.H. and S.M.H. wish to
acknowledge support from EPSRC fellowship EP/K041215/1. | en_GB |
dc.identifier.citation | Vol 97, 155418 | en_GB |
dc.identifier.doi | 10.1103/PhysRevB.97.155418 | |
dc.identifier.uri | http://hdl.handle.net/10871/33246 | |
dc.language.iso | en | en_GB |
dc.publisher | American Physical Society | en_GB |
dc.relation.url | http://hdl.handle.net/10871/32414 | |
dc.rights | ©2018 American Physical Society | en_GB |
dc.title | Investigating the nature of chiral near-field interactions (article) | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2018-06-18T15:09:22Z | |
dc.identifier.issn | 2469-9950 | |
dc.description | This is the final version of the article. Available from American Physical Society via the DOI in this record. | en_GB |
dc.description | The dataset associated with this article is located in ORE at: http://hdl.handle.net/10871/32414 | |
dc.identifier.journal | Physical Review B | en_GB |