Near-field transport by a bent multi-wire endoscope.

In this paper, we investigate the impact of bending a multi-wire endoscope in the context of subwavelength imaging and near-field transport. To this end, we study the reflection and transmission by a "bent" wire medium in different configurations and demonstrate that the structure can be quite robust to the effect of bending provided the total length of the bent wires satisfies the Fabry-Pérot condition. The study is carried out relying on an analytical homogenization theory and using two additional boundary conditions obtained with physical arguments. It is proven that a structure formed by two connected sets of tilted metallic wires can allow for the near field transport with a deeply subwavelength resolution. To illustrate the applications and potentials of the results, the performance of bent multi-wire endoscopes is characterized using full wave numerical simulations. [ABSTRACT FROM AUTHOR]