  In this article, we report the growth of gold nanorods on glass substrates
and copper nanoparticle thin films by cylindrical direct current magnetron
sputtering (CDCMS) at room temperature. The grown gold nanorods have short
lengths of < 20nm and show negative optical parameters in UV-Vis region. So far
negative permittivity and permeability were only shown for complex artificial
structures. In a case of simple structures like gold nanorods, the negative
optical parameters were only predicted by simulation methods and considering
ideal structures and they were not yet reported by experimental groups, who has
grown or synthesis gold nanorods by physical or chemical methods. The small
size of gold nanorods and thickness of our samples compare to other
experimental groups could be the reason of negative permittivity and
permeability in our case. Low loss metamaterials with simultaneously negative
permittivity and permeability are desired for practical applications in many
optical devices such as optical switching, waveguides, modulators, and
plasmonic antenna arrays. The optical properties of the grown gold nanorods
were defined by ultraviolet- visible (UV-Vis) spectroscopy and their quality
was assessed through multi-technique characterization using transmission
electron microscopy (TEM), field emission scanning electron microscopy
(FE-SEM), X-ray diffraction (XRD), and energy dispersed X-ray (EDX).
