Superconducting Metamaterials and Terahertz Applications
Summary
Superconducting metamaterials combine the zero‐resistance and quantum coherence of superconductors with the geometric design freedom of metamaterials to achieve exceptional electromagnetic properties at terahertz frequencies. By patterning superconducting films into subwavelength resonant elements, researchers can greatly reduce dissipative losses and introduce strong nonlinearities that enable dynamic tuning via temperature, magnetic field or current. These advances have unlocked new opportunities in terahertz sensing, high‐speed modulators, low‐loss filters and slow‐light devices. In particular, superconducting split‐ring resonators and arrays of rf superconducting quantum‐interference devices demonstrate both high quality factors and pronounced field‐dependent response, paving the way for compact spectrometers, sensitive detectors and quantum information interfaces. The integration of superconducting metamaterials with emerging two‐dimensional materials further promises chip‐scale control of terahertz waves for communications, imaging and on‐chip spectroscopy.
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Superconducting Metamaterials and Terahertz Applications publication trend
The graph below shows the total number of articles in superconducting metamaterials and terahertz applications across all publications each year (not limited to Nature Index journals).
Technical terms
Metamaterial: Artificially structured medium whose electromagnetic properties arise from engineered subwavelength elements.
Terahertz (THz) radiation: Electromagnetic waves with frequencies between roughly 0.1 THz and 10 THz, bridging microwave and infrared regions.
Superconductivity: Quantum phenomenon in which certain materials exhibit zero electrical resistance and expel magnetic fields below a critical temperature.
Split‐ring resonator (SRR): Subwavelength metallic or superconducting ring with a gap, used to produce strong magnetic resonance at designed frequencies.
Electromagnetically induced transparency (EIT): Interference effect between resonant modes that creates a narrow transparency window in an otherwise absorbing medium.
Josephson junction: Weak link between superconductors that supports nonlinear inductance and quantum tunnelling of Cooper pairs.
References
- Tunable Broadband Transparency of Macroscopic Quantum Superconducting Metamaterials. Physical Review X (2015).
- Sensing, Switching and Modulating Applications of a Superconducting THz Metamaterial. IEEE Sensors Journal (2021).
- Realization and Modeling of Metamaterials Made of rf Superconducting Quantum-Interference Devices. Physical Review X (2013).
- Active Terahertz Modulator and Slow Light Metamaterial Devices with Hybrid Graphene–Superconductor Photonic Integrated Circuits. Nanomaterials (2021).
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