Fourcross shaped metamaterial filters fabricated from high temperature superconducting YBCO and Au thin films for terahertz waves

Date

2017-07-01

Author

Demirhan, Y.
Alaboz, H.
Nebioglu, M. A.
Mulla, B.
AKKAYA, MAHİNUR
Altan, Hakan
SABAH, CUMALİ
Ozyuzer, L.

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In this study, we present a new, unique fourcross shaped metamaterial terahertz (THz) filter fabricated from both gold thin films and YBa2Cu3O7-d d high T-c superconducting thin films. A commercial electromagnetic simulation software, CST Microwave Studio, is used to design and optimize the metamaterial filter structures. The proposed fourcross shaped rectangular filter structure consists of periodic metallic rings where strip lines are located at the sides of the ring. Fourcross metamaterial filters are fabricated by using e-beam lithography and ion beam etching techniques. Terahertz time-domain spectroscopy measurements validated the design predictions for both the center frequencies and bandwidths of the resonances due to the fourcross structures. The resonance switching of the transmission spectra was investigated by lowering the temperature below the critical transition temperature. This resonance switching effect is not observed in filters made up of metals. This novel fourcross rectangular resonator with a temperature-dependent resonance behavior holds great potential for active, tunable and low loss THz devices for imaging, sensing, and detection applications.

Subject Keywords

Electrical and Electronic Engineering, Materials Chemistry, Condensed Matter Physics, Metals and Alloys, Ceramics and Composites

URI

https://hdl.handle.net/11511/35768

Collections

Department of Physics, Article