Fig. 7From: Chiral metamaterials: enhancement and control of optical activity and circular dichroismDispersionless ellipticity. a A unit cell of a meshed helical metamaterial. At electrical resonance (ER), the incident electric field (E) induces a strong magnetisation (M) field in the same direction. b Polarisation angle obtained by FDTD simulations, measurement and analytical model. c Simulated magnetic field in the unit cell and a photograph of fabricated sample. d Ellipticity obtained by FDTD simulations, measurement and analytical model. The meshed helical metamaterial shows nonresonant feature in chirality parameter spectrum with nondispersive ellipticity [59]Back to article page