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Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Sharp Fano resonances in THz metamaterials.
Ranjan Singh1, Ibraheem A I Al-Naib, Martin Koch
1School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA. ranjan@lanl.gov
Optics Express
|April 1, 2011
Summary
Researchers created sharp Fano resonances in terahertz metamaterials by introducing asymmetry into split ring resonators. This breakthrough enables high Q-factor resonances for potential biochemical sensing and novel terahertz emitters.
Area of Science:
- Physics
- Materials Science
- Nanotechnology
Background:
- Metamaterials offer unique electromagnetic properties.
- Split ring resonators are fundamental metamaterial structures.
- Fano resonances provide sharp spectral features.
Purpose of the Study:
- To investigate Fano resonances in planar terahertz metamaterials.
- To explore the effect of asymmetry on resonance characteristics.
- To assess the potential applications of these sharp resonances.
Main Methods:
- Fabrication of planar terahertz metamaterials with two gap split ring resonators.
- Introduction of controlled asymmetry into the resonator structure.
- Numerical simulations to analyze resonance properties and Q factors.
Main Results:
- Observed sharp Fano resonances by breaking the symmetry of the metamaterial.
- Achieved significantly higher Q factors compared to single gap resonators.
- Demonstrated exponential decrease in Q factor with increasing asymmetry.
- Simulated Q factor of 50 for minimal asymmetry.
Conclusions:
- Minute structural variations enable tuning of Fano resonances.
- High Q-factor Fano resonances are suitable for biochemical sensing.
- Strong current oscillations at Fano resonance frequencies can be used for terahertz narrow band emitters.
