Multi-mode circular dichroism in n-fold rotational symmetric metamaterials

Circular dichroism in planar nonchiral plasmonic metamaterials.

It is shown theoretically that a nonchiral, two-dimensional array of metallic spheres exhibits optical activity as manifested in calculations of circular dichroism. The metallic spheres occupy the sites of a rectangular lattice, and for off-normal incidence they show a strong circular-dichroism effect around the surface-plasmon frequencies. The optical activity is a result of the rectangular sy...

Circular dichroism of planar chiral magnetic metamaterials.

We propose, fabricate, and study a double-layer chiral planar metamaterial that exhibits pronounced circular dichroism at near-infrared wavelengths. The antisymmetric oscillation modes of the two coupled layers allow local magnetic-dipole moments and enhanced polarization effects compared with similar single-layer systems where only electric-dipole moments occur. Experiment and rigorous theoret...

Circular dichroism of four-wave mixing in nonlinear metamaterials

Alec Rose,1 David A. Powell,2 Ilya V. Shadrivov,2 David R. Smith,1 and Yuri S. Kivshar2,3 1Center for Metamaterials and Integrated Plasmonics, Duke University, Durham, North Carolina 27708, USA 2Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia 3National Research University of Information ...

Circular dichroism based refractive index sensing using chiral metamaterials.

A new strategy to improve the sensing ability of localized surface plasmon resonance sensors is presented. By employing chiral plasmonic nanostructures, circularly polarized differential transmittance can show enhanced sensing performance over circularly polarized transmittance under certain conditions.

Chirality and Multi-photon Photoelectron Circular Dichroism