Capacitance tuning of nanoscale split-ring resonators

We investigate the capacitance timing of nanoscale split-ring resonators. Based on a simple inductor-capacitor circuit model, we derive an expression, where the inductance is proportional to the area while the capacitance reflects the aspect ratio of the slit. The resonance frequency may thus be tuned by the slit aspect ratio leaving the area, the lattice constant Lambda and nearest-neighbor coupling in periodic structures invariant. Experimental data follow the predictions of the simple LC-model. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3263191]