Abstract：
:Chirality is an intriguing property of certain molecules, materials or artificial nanostructures, which allows them to interact with the spin angular momentum of the impinging light field. Due to their chiral geometry, they can distinguish between left- and right-hand circular polarization states or convert them into each other. Here we introduce an approach towards optical chirality, which is observed in individual two-dimensional and geometrically mirror-symmetric nanostructures. In this scheme, the chiral optical response is induced by the chosen heterogeneous material composition of a particle assembly and the corresponding resonance behaviour of the constituents it is built from, which breaks the symmetry of the system. As a proof of principle, we investigate such a structure composed of individual silicon and gold nanoparticles both experimentally, as well as numerically. Our proposed concept constitutes an approach for designing two-dimensional chiral media tailored at the nanoscale, allowing for high tunability of their optical response.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Banzer P,Woźniak P,Mick U,De Leon I,Boyd RWdoi
10.1038/ncomms13117subject
Has Abstractpub_date
2016-10-13 00:00:00pages
13117issn
2041-1723pii
ncomms13117journal_volume
7pub_type
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