Slow light by hybridized double split ring resonators

Here, we design, fabricate, and characterize EIT-metamaterials by hybridizing two DSRRs into a single unit cell. First we, develop a method to determine the effective thickness of metamaterials which is crucial in calculating the group velocity of light. Then, we present a novel approach to enhance and dynamically tune the slow light characteristic by twisting the inner SRRs of two hybridized DSRRs in a flexible EIT-metamaterial. The design reduces the speed of light by 0.06 time compared with air.