TY  - JOUR
AB  - Purpose– The work is aimed at studying the electromagnetic interaction between a homogeneous, isotropic single-negative (SNG) slab and an inhomogeneous, anisotropic double-positive (DPS) slab. Design/methodology/approach– The approach is based on the transformation optics framework, which allows systematic design and modelling of anisotropic, inhomogeneous metamaterials with inherent field-manipulation capabilities. Findings– The paper finds that a transformation-optics-based DPS slab can compensate the inherent opaqueness to the electromagnetic radiation of a SNG slab. Here, “compensation” means that the resulting bi-layer may give rise to zero-reflection for a normally-incident plane wave at a given frequency. Such phenomenon is inherently accompanied by (de)funneling effects for collimated-beam illumination, and it turns out to be quite robust to material losses as well as geometrical and constitutive-parameter truncation. Originality/value– The results provide further evidence and insight in how SNG-like responses may be emulated (within narrow parametric ranges) by suitably-engineered spatial inhomogeneity and anisotropy in DPS media. Moreover, they also show that resonant transmission phenomena through SNG materials may be engineered via the powerful framework of transformation optics.
VL  - 32
IS  - 6
SN  - 0332-1649
DO  - 10.1108/COMPEL-10-2012-0221
UR  - https://doi.org/10.1108/COMPEL-10-2012-0221
AU  - Castaldi Giuseppe
AU  - Galdi Vincenzo
AU  - Alù Andrea
AU  - Engheta Nader
PY  - 2013
Y1  - 2013/01/01
TI  - Electromagnetic funneling through a single-negative slab paired with a double-positive transformation slab
T2  - COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering
PB  - Emerald Group Publishing Limited
SP  - 1821
EP  - 1833
Y2  - 2024/09/23
ER  -