  Absorption and scattering of the impinging electromagnetic waves are the two
fundamental operations describing the energy exchange of any, organic or
inorganic, particle with its environment. In the case of virion cells,
substantial extinction power, counting both absorbing and scattering effects,
is a prerequisite for performing a variety of coupling actions against the
viral particles and, thus, a highly sought-after feature. By considering
realistic dispersion for the dielectric permittivity of proteins and a
core-shell modeling allowing for rigorous formulation via Mie theory, we report
optical extinction resonances for corona-virions at mid-infrared range that are
not significantly perturbed by changes in the objects size or the background
host. Our findings indicate the optimal regime for interaction of photonic
radiation with viral particles and may assist towards the development of
equipment for thermal damage, disintegration or neutralization of coronavirus
cells.
