Electromagnetic shielding via a virtual pillar with a magnetic wall

It is demonstrated that the objects enclosed by a virtual pillar with a magnetic wall can be completely shielded from EM waves through numerical simulations. The simulated total scattering cross section of a dielectric rod enclosed by a virtual pillar is identical to that of an empty virtual pillar. In addition, the simulated spatial distributions of the total fields including the incident electric field and scattered electric field from the former are similar to those from the latter. The penetration depth of electromagnetic waves into the pillar is derived as a function of the height of the pillar. A virtual pillar with an open boundary can provide an unusual electromagnetic environment.