Asymmetric planar terahertz metamaterials
- Los Alamos National Laboratory
- PHILIPPS UNIV
- OKLAHOMA STATE UNIV
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.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1003805
- Report Number(s):
- LA-UR-10-02169; LA-UR-10-2169; TRN: US201103%%97
- Country of Publication:
- United States
- Language:
- English
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