Coupled Surface Mode Resonances in Finite Transverse-Width Superlenses

Superlens slabs excite coupled surface wave modes to provide amplification to incident evanescent waves. If a super-lens slab has a finite transverse-width, surface wave reflections at the edges of the lens restrict allowed coupled surface modes within the lens. In this paper we simulate the coupled surface modes of a two dimensional finite-width, finite thickness, double negative superlens slab. By calculating the scattered electric field intensity and radiated power we show how a superlens slab with finite transverse-width supports discrete, radiating resonant modes, whose solutions closely align with the locus of mode solutions for an infinitely wide lens.