Journal
ADVANCED OPTICAL MATERIALS
Volume 5, Issue 16, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201700200
Keywords
chiral metamaterials; direct laser writing; electroless silver plating; plasmonics; twisted omega
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Funding
- European Union's Horizon research and innovation programme under the Marie SklodowskaCurie grant [655249]
- BW Stiftung
- ERC Advanced Grant COMPLEXPLAS
- Marie Curie Actions (MSCA) [655249] Funding Source: Marie Curie Actions (MSCA)
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The plasmonic version of a 3D chiral meta-atom which consists of a loop-wire structure, namely the so-called twisted omega particle, is experimentally realized. The structure is fabricated by direct laser writing and subsequent electroless silver plating, a novel technique capable of producing truly 3D photonic nanostructures. In this case, the metallic wire of finite length supports an electric dipole resonance, whereas the loop acts as a split-ring resonator which exhibits a magnetic dipole resonance, leading to the separation of right-handed circularly polarized light and the left-handed one. The arising optical activity is discussed in terms of a single oscillator model system used classically to describe the generation of natural optical activity in chiral media, and it is shown that the twisted omega particle acts as its exact plasmonic analogue.
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