Dispersionless optical activity in metamaterials

Abstract

We introduce a chiral metamaterial with strong, non-resonant optical activity, and very low polarization ellipticity. We achieve this by combining a meta-atom and its complementary structure into a meta-molecule, resulting in the coupling of magnetic and electric dipole responses. In contrast to either a pair of crosses, or complementary crosses, this structure has low dispersion in the optical activity at the transmission resonance. We also study the excitation mechanism in this structure, and optimize the optical activity through changing the twist angle.

3 pages, 5 figures

References in corpus (1)

• Near-field interaction of twisted split-ring resonators

Cited by in corpus (5)

• Broadband chiral metamaterials with large optical activity
• Chiral metasurface formed by 3D-printed square helices: A flexible tool to manipulate wave polarization
• Broadband dispersionless polarization rotation with composite chiral metamaterials
• Experimental evidence of giant pure optical activity in a metasurface based on a complementary twisted cross configuration
• Broadband angle- and permittivity-insensitive nondispersive optical activity based on chiral metamaterials