Magnetic high-Q resonance in planar toroidal metamaterial

Cojocari, Maria V.; Chuguevsky, Vitaly; Volsky, Nikita; Basharin, Alexey A.

doi:10.1109/iceaa.2019.8879097

2019 International Conference on Electromagnetics in Advanced Applications (ICEAA) 2019

DOI: 10.1109/iceaa.2019.8879097

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Magnetic high-Q resonance in planar toroidal metamaterial

Maria V. Cojocari

Vitaly Chuguevsky

Nikita Volsky

et al.

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Cited by 2 publications

References 41 publications

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Dual-band all-optical logic gate based on coherent control principles

Wang,

Han

et al. 2025

Optics Communications

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Dual-band all-optical logic gate based on coherent control principles

Wang,

Han

et al. 2025

Optics Communications

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Metabolometer Based on Toroidal Response

Cojocari,

Merenkov,

Kovalev

et al. 2023

Jetp Lett.

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Toroidal metamaterials stand out by extremely high-Q resonances. Their radiation losses are suppressed, and fields in the metamolecules origin are extremely high and sensitive to the additional losses. In this letter, we introduce a novel concept of meta-bolometer. It is based on the combination of a microwave high-Q factor toroidal metamaterial as readout device with embedded micro-pad superconductor as an absorber of terahertz (THz) radiation. We establish that a pad with 20 kOhm/sq sheet resistance reduces metamaterial Q-factor and changes the stop-band level by as much as −50 dB at 1.5 GHz. Importantly, this sensitivity to the additional losses requires no galvanic connection to the absorber. This allows one to detect THz heating of superconducting pad via the change in metamaterial transmission spectrum. We consider the absorber as a superconducting hafnium film because of its nonlinear response at 1.5 GHz below Tc = 400 mK. Respectively, we estimate the losses in hafnium over temperature at the metamaterial resonant frequency using Mattis–Bardeen theory. This approach can significantly improve the future design of the terahertz/millimeter-wave detectors.

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Magnetic high-Q resonance in planar toroidal metamaterial

Cited by 2 publications

References 41 publications

Dual-band all-optical logic gate based on coherent control principles

Dual-band all-optical logic gate based on coherent control principles

Metabolometer Based on Toroidal Response

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