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The suggestive idea of "cloaking" an electromagnetic sensor, i.e., stronglyreducing its visibility (scattering) while maintaining its field-sensing(absorption) capabilities, has recently been proposed in the literature, basedon scattering-cancellation, Fano-resonance, or transformation-opticsapproaches. In this paper, we explore an alternative,transformation-optics-based route, which relies on the recently-introducedconcept of "anti-cloaking." More specifically, our proposed approach relies ona suitable tailoring of the competing cloaking and anti-cloaking mechanisms,interacting in a two-dimensional cylindrical scenario. Via analytical andparametric studies, we illustrate the underlying phenomenology, identify thecritical design parameters, and address the relevant optimality and tradeoffissues, taking also into account the effect of material losses. Our resultsconfirm the envisaged potentials of the proposed transformation-optics approachas an attractive alternative route to sensor cloaking.

Power scattering and absorption mediated by cloak/anti-cloak interactions: A transformation-optics route towards invisible sensors