Magnetic response of dendritic structures at infrared frequencies

We propose a quasi-periodic dendritic resonant magnetic model that can be used for the realization of the negative permeability at infrared frequencies. The numerical simulation exhibits a magnetic response when the incident light is perpendicular to the plane of the model. The copper dendritic structures are prepared by the electro-deposition method. And the transmission spectrum of this dendritic structure shows a magnetic response at infrared frequencies with a maximum transmission -7.95 dB. Further studies demonstrate that the magnetic response relate to the fractal dimension of the dendritic structure to a certain extent.