Tunable THz metamaterials based on an array of paraelectric SrTiO3 rods
This work presents theoretical and experimental investigations of a tunable metamaterial which exhibits negative permeability in the THz frequency range. The tunability is obtained by temperature changes, and the sample consists of an array of high-permittivity SrTiO3 (STO) rods micromachined by a femtosecond laser. Structures exhibiting a negative permeability on multiple frequency bands are also investigated and a proper choice of the dimensions of the pattern allows us to achieve a substantial broadening of the frequency band with negative μ.
KeywordsFemtosecond Laser Effective Permeability Split Ring Resonator Negative Permeability Ative Permeability
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