Asymmetric planar terahertz metamaterials
Using terahertz time-domain spectroscopy, we report an experimental observation of three distinct resonances in split ring resonators (SRRs) for both vertical and horizontal electric field polarizations at normal incidence. Breaking the symmetry in SRRs by gradually displacing the capacitive gap from the centre towards the comer of the ring allows for an 85% modulation of the fundamental inductive-capacitive (LC) resonance. Increasing asymmetry leads to the evolution of an otherwise inaccessible high quality factor electric quadrupole resonance that can be exploited for bio-sensing applications in the terahertz region.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- LA-UR-10-02169; LA-UR-10-2169
- DOE Contract Number:
- Resource Type:
- Journal Article
- Research Org:
- Los Alamos National Laboratory (LANL)
- Sponsoring Org:
- Country of Publication:
- United States
- 36 MATERIALS SCIENCE; ASYMMETRY; ELECTRIC FIELDS; MODULATION; QUADRUPOLES; QUALITY FACTOR; RESONANCE; RESONATORS; SPECTROSCOPY; SYMMETRY
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