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Fig. 7 | Nano Convergence

Fig. 7

From: Chiral metamaterials: enhancement and control of optical activity and circular dichroism

Fig. 7

Dispersionless 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]

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