Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/7527
Title: Thermally and optically tunable sub-terahertz superconducting fishnet metamaterial
Authors: Sabah, Cumali
Mulla, Batuhan
Altan, Hakan
Özyüzer, Lütfi
Keywords: Metamaterials
Optical tunability
Superconductivity
Thermal tunability
Quartz substrate
Publisher: Elsevier Ltd.
Source: Sabah, C., Mulla, B., Altan, H., and Özyüzer, L. (2018). Thermally and optically tunable sub-terahertz superconducting fishnet metamaterial. Physica C: Superconductivity and its Applications, 544, 46-53. doi:10.1016/j.physc.2017.10.012
Abstract: In this paper, a novel fishnet metamaterial structure is designed and analyzed under different material combinations and under different active controlling techniques. The results indicate that, the proposed fishnet metamaterial has a single resonance with double negativity at 0.39 THz when quartz substrate and aluminum is utilized in the design. Moreover, when the metallic parts are replaced with YBCO, the proposed design also exhibits double negativity with a stronger resonance and can be used as a switch between the double negative and single negative modes if the temperature is altered. In addition to these, when substrate (quartz) is replaced with MgO, the resonance shifts from 0.39 THz to 0.26 THz and shows double negativity. Moreover, switching properties under illumination can also be obtained when the silicon is utilized in the design (MgO-YBCO combination). According to these results, it is found that, in the case that the conductivity of silicon exceeds a certain value, the character of the resonance changes from double negative to the single negative mode.
URI: https://doi.org/10.1016/j.physc.2017.10.012
https://hdl.handle.net/11147/7527
ISSN: 0921-4534
0921-4534
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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