18 May 2011 Effect of surface roughness on subwavelength imaging with layered metamaterial optical elements
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Abstract
We characterize the influence of surface roughness on resolution and on the transmission coefficient of double layered silver-TiO2 superlenses. Rough surfaces are modelled with a Gaussian statistics based on experimental AFM measurements of e-beam evaporated layers, whereas the rest of the analysis is numerical and is obtained using 2D FDTD. The roughness of a surface is described with the root-mean-square of its height and with the width of its autocorrelation function. Our modelling results confirm that surface roughness is a critical limiting factor for both superresolution and for large transmission efficiency.
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T. Stefaniuk, T. Stefaniuk, G. Nowak, G. Nowak, R. Kotynski, R. Kotynski, } "Effect of surface roughness on subwavelength imaging with layered metamaterial optical elements", Proc. SPIE 8070, Metamaterials VI, 807010 (18 May 2011); doi: 10.1117/12.889188; https://doi.org/10.1117/12.889188
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