Abstract

The unique effective material parameters, such as negative indices, corresponding to its geometry design of Metamaterials (MMs) have attracted enormous interests in last decade. Among them, the split ring resonators (SRRs) were demonstrated as the promising candidate to perform the magnetic response which revealing a negative permeability. To obtain magnetic response of SRRs, the magnetic field component of incident light must oscillate through the SRR plane. Thus, fabricating the standing-up type SRRs, in which the normal incident light easily has largest magnetic field component perpendicular to the SRR plane, are the most direct solution [1]. In the application point of view, the criterion to construct a substantial device is to possess isotropic optical responses between electromagnetic waves and MMs. In the present work, we fabricated a four-fold symmetric MMs by metal-stress-driven assembled three-dimensional (3D) SRRs and demonstrated isotropic characteristics of the fundamental mode with illuminated light within a finite incident angle.

© 2013 Japan Society of Applied Physics, Optical Society of America