Resonant surface roughness interactions in planar superlenses

Simulations were performed to investigate how various spatial frequencies of surface roughness, in planar superlenses, affect superlens performance. Resonant behaviour was observed and increases between 110% and 267%, in image line-edge roughness (LER), were observed at the peaks relative to the average image LER observed outside these resonant frequencies. This investigation suggests that the position of these resonance peaks is dependent upon the periodic character of the object being imaged, implying that a resonant coupling between shadow mask features and surface roughness takes place. These results present additional considerations for future studies within the field of superlensing.