Time reversal of surface plasmons

<p style='text-indent:20px;'>We study in this work the so-called "instantaneous time mirrors" context of surface plasmons. The latter are associated with high frequency waves at a conducting sheet. Instantaneous mirrors were introduced [<xref ref-type="bibr" rid="b3">3</xref>], idea that singular perturbations variable wave-type equation create time-reversed focusing wave. We consider time-dependent three-dimensional Maxwell's equations, coupled to Drude's model for description current. mirror is modeled by sudden, strong, change Drude weight electrons on Our goal characterize wave, particular quantify quality refocusing. establish depends distance source sheet, and some physical parameters such as relaxation electrons. also show that, addition plasmonic generates free propagating wave offers, contrary resolution direction orthogonal Blurring effects due non-instantaneous finally investigated.</p>