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Chirality of Symmetric Resonant Heterostructures

2018; Wiley; Volume: 12; Issue: 9 Linguagem: Inglês

10.1002/lpor.201800109

1863-8899

Sergey Nechayev, Paweł Woźniak, Martin Neugebauer, René Barczyk, Peter Banzer,

Liquid Crystal Research Advancements

Abstract Chiroptical effects arising in mirror‐symmetric geometrically achiral resonant heterostructures are investigated. It is shown that coalescence of extrinsic chirality, heterogeneous morphology, and substrate‐induced break of symmetry leads to pronounced circular dichroism and circular birefringence. The physics of the involved phenomena is elucidated by studying spin‐splitting in scattering and hybridized dipolar modes of a heterodimer made of gold and silicon nanoparticles of the same shape and size. The work sheds new light on the optical properties of heterogeneous nanostructures and paves the way for designing polarization‐controlled tunable heterogeneous optical elements.