Tuned permeability in terahertz split-ring resonators for devices and sensors
A process is demonstrated for tuning the magnetic resonance frequency of a fixed split-ring resonator array, by way of adding material near the split-ring elements. Applying drops of a silicon-nanospheres/ethanol solution to the surface of the sample decreases the magnetic resonance frequency of the split-ring array in incremental steps of 0.03 THz. This fine tuning is done post fabrication and is demonstrated to be reversible. The exhibited sensitivity of the split-ring resonance frequency to the presence of silicon nanospheres also suggests further application possibilities as a sensor device. © 2007 American Institute of Physics.
Driscoll, T; Andreev, GO; Basov, DN; Palit, S; Cho, SY; Jokerst, NM; Smith, DR
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