Pseudo-planar conjugated swastikas metamaterial with giant circular dichroism and negative refraction at near-infrared region

In this paper, a pseudo-planar conjugated swastikas metamaterial (MM) was proposed and investigated numerically at near-infrared region. Numerical results show that the circular dichroism (CD) is more than 25 dB at resonance frequencies. Owing to the stronger chirality, the refractive indices for right-handed and left-handed circularly polarized waves are negative. The surface current distributions are studied to explain mechanism of the chiral behaviors. The pseudo-planar MM is easy to fabricate and thus lead to many applications in photonic devices due to its giant CD effect and negative refraction.