  Surface plasmons with MHz-GHz energies are predicted by using milliparticles
made of metamaterials that behave like metals in the radiofrequency range. In
this work, the so-called Radioplasmonics is exploited to design scatterers
embedded in different realistic media with tunable absorption or scattering
properties. High-quality scattering/absorption based on plasmon excitation is
demonstrated through a few simple examples, useful to build antennas with
better performance than conventional ones. Systems embedded in absorbing media
as saline solutions or biological tissues are also considered to improve
biomedical applications and contribute with real-time, in-vivo monitoring tools
in body tissues. In this regard, any possible implementation is criticized by
calculating the radiofrequency heating with full thermal simulations. As proof
of the versatility offered by radioplasmonic systems, plasmon "hybridization"
is used to enhance near-fields to unprecedented values or to tune resonances as
in optical spectra, minimizing the heating effects. Finally, a monitorable
drug-delivery in human tissue is illustrated with a hypothetical example. This
study has remarkable consequences on the conception of plasmonics at
macroscales. The recently-developed concept of "spoof" plasmons achieved by
complicated structures is simplified in Radioplasmonics since bulk materials
with elemental geometries are considered.
