6533b855fe1ef96bd12b087a
RESEARCH PRODUCT
Orientation-Dependent Handedness of Chiral Plasmons on Nanosphere Dimers: How to Turn a Right Hand into a Left Hand
V. Ara ApkarianKate RodriguezMayukh BanikEero HulkkoEero Hulkkosubject
chiroptical activityAngular momentumMirror imagePhysics::Optics02 engineering and technology01 natural sciencesMolecular physicssymbols.namesakeOpticsPT invariancemultipolar Raman0103 physical sciencesnonreciprocalElectrical and Electronic Engineering010306 general physicsta116PlasmonPhysicsta114business.industryParity (physics)chiral connectedness021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialsT-symmetrysymbolsRaman optical activityRaman optical activity0210 nano-technologyChirality (chemistry)businessRaman scatteringBiotechnologydescription
Optical activity, which is used as a discriminator of chiral enantiomers, is demonstrated to be orientation dependent on individual, and nominally achiral, plasmonic nanosphere dimers. Through measurements of their giant Raman optical activity, we demonstrate that L/R-handed enantiomers can be continuously turned into their R/L-handed mirror images without passing through an achiral state. The primitive uniaxial multipolar response, with demonstrable broken parity and time reversal symmetry, reproduces the observations as resonant Raman scattering on plasmons that carry angular momentum. The analysis underscores that chirality does not have a quantitative continuous measure and recognizes the manipulation of superpositions of multipolar plasmons as a paradigm for novel optical materials with artificial magnetism.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-11-18 | ACS Photonics |