  Conjugate-impedance matched superabsorbers are metamaterial bodies whose
effective absorption cross section greatly exceeds their physical dimension.
Such objects are able to receive radiation when it is not directly incident on
their surface. Here, we develop methods of physical modeling of such structures
and investigate interactions of the superabsorbers with passing electromagnetic
radiation. The particular superabsorbing structure under study is a wormhole
comprised of meshes of loaded transmission lines. A theory of electromagnetic
wave propagation and absorption in such metamaterial structures is developed.
At the frequency of operation, the structure exhibits greatly enhanced
absorption as compared to the black body-type absorber of the same size.
Peculiar wave absorption effects such as trapping of nearby passing beams of
electromagnetic radiation are demonstrated by numerical simulations. Possible
modifications of the wormhole structure under the goal of optimizing absorption
while minimizing complexity of the involved metamaterials are discussed.
Conjugate-impedance matched superabsorbers may find applications as efficient
harvesters of electromagnetic radiation, novel antennas, and sensors.
