Limits of Geometrical Scaling of Split Rings and Double-Bar Resonators in the Visible

In this presentation we will address the problem of realization of artificial magnetic materials for optical applications. Various approaches potentially leading to this goal will be reviewed and compared. In particular, the resonant response of split-ring resonators and double-bar resonators used to create artificial magnetic response at terahertz and optical frequencies will be analysed in detail. Estimations for the highest achievable resonant frequency will be given, and the problem of particle shape optimization will be addressed.