Experiments and Simulations of Microwave Negative Refraction in Split Ring and Wire Array Negative Index Materials, 2D Split-Ring Resonator and 2D Metallic Disk Photonic Crystals
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In this chapter, we describe a series of simulations and experiments on composites displaying negative refraction. The materials consist of both split ring resonator/wire structures and 2D photonic crystals. The finite difference time domain simulations were found to closely correspond to our microwave frequency measurements. Our exploration of photonic structures evolved from the serendipitous experimental observation that our early split ring resonators exhibited planar slab focusing in the absence of a wire grid. Although split ring resonator/wire grid composites were shown to display negative index behavior over a vary narrow band-pass, the photonic crystal structures display negative phase propagation and negative refraction over a much larger frequency band.
KeywordsPhotonic Crystal Negative Refraction Wire Array Main Beam Negative Index
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