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Volume 25 - ICOP & ICPET 2019
ICOP & ICPET _ INPC _ ICOFS 2019, 25 - ICOP & ICPET 2019: 421-424 |
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Kalhor S, Delfanazari K, Ghanaatshoar M. Tunable THz metamaterial based on underdoped high-Tc superconducting Bi2Sr2CaCu2O8+δ . ICOP & ICPET _ INPC _ ICOFS 2019; 25 :421-424
URL: http://opsi.ir/article-1-1669-en.html
URL: http://opsi.ir/article-1-1669-en.html
1- Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran, Iran
2- Electrical Engineering Division, Engineering Department, University of Cambridge
2- Electrical Engineering Division, Engineering Department, University of Cambridge
Abstract: (1827 Views)
In this paper, we report on the terahertz (THz) resonance response of a metamaterial based on high-temperature superconducting Bi2Sr2CaCu2O8+δ (BSCCO). We calculate the a-b plane complex permittivity and surface impedance of an underdoped BSCCO thin film, to study the electromagnetic response of the BSCCO split ring resonators (SRR) as a function of temperature. The dip in transmission resonance is found to be strongly temperature dependent with strongest resonance response at the lowest temperature. As temperature increases the transmission dip shifts towards lower frequencies at the same time with a decrease in resonance strength. The resonance frequency moves back to higher frequencies at temperatures close to the superconducting transition temperature (Tc) but the resonance strength continues to decrease. The dip in transmission resonance fades up completely above Tc.
Keywords: BSCCO thin film, high-Tc superconductors, metamaterials, superconducting photonics, terahertz devices
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