Free space measurements of negative refraction with varying angles of incidence

Abstract

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Design and measurement of a spiral-cell PMC for metamaterial applications

“…Artificial negative magnetic permeability mediums are generally composed by SRRs resonators, introduced by Pendry [1]. Other examples of subwavelength metamaterial structures are the BC-SRR and planar spiral resonators (SRs) [2], the capacitively-loaded loops (CLLs) [3], and the spiral resonators [4], which reduce the electrical size of the unit cell. In this paper, spiral resonators are designed, fabricated and tested for metamaterial applications.…”

Free space measured loss comparison of single and double Ring resonators for negative index media

“…The index of refraction n was then calculated using the Snell's law equation n sin(α) = sin(θ) where α is the prism angle, either 11 or 12 degrees, and θ is the measured angle of refraction from the normal in air. More detail of the technique appears in [4]. The plots in Fig.…”

Radio Frequency and Optical Metamaterials

“…This also defines a clockwise direction of rotation from 0° to 90° for the SRR gaps. The measured frequency response and the refractive index as determined by Snell's law [3] are shown in Figure 2 for each of the configurations. Since the orientation of the electric field of the propagating wave is parallel to the WP as shown in Figure 1, it is the effect of the orientation of the electric field relative to the SRR gaps that is observed in the frequency response of the balanced SRR-WP media ( Figure 2).…”