Broadband electromagnetically induced transparency in metamaterials based on hybridization bandgap

Broadband electromagnetically induced transparency in metamaterials based on hybridization bandgap

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We present a broadband electromagnetically induced transparency-like (EIT-like) effect in a microwave waveguide system by employing a bright meta-atom side-coupled to a linear chain of dark meta-atoms with a hybridization bandgap (HBG).We find that such a configuration can generate a wideband EIT response of up to 145 MHz, covering 23.7% of the central Girls Shorts frequency.We also show that the EIT bandwidth can even extend to 211 MHz by further broadening the HBG while keeping the device Ball - Sticks volume unchanged.

We emphasize that the EIT-like meta-molecules are subwavelength structures with only about one tenth of the operating wavelength.Our findings will be beneficial for realizing compact broadband slow light components in communication systems.