1 Department of Electrical Engineering, Technical University of Denmark2 Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark3 University of Arizona
A spherical active coated nanoparticle consisting of a silica nanocore covered concentrically with a silver nanoshell is examined analytically and numerically in the presence of one, two, or four quantum emitters modeled by electric Hertzian dipoles. The ability of the active coated nanoparticle to effectively cloak the emitters to a far-field observer is reported and explained through thorough near- and far-field investigations. This property offers an interesting route toward the jamming of quantum emitters/nanoantennas that might be of potential use, for instance, in biological fluorescence assays where the suppression of certain emission lines might be desired while simultaneously enhancing the emission of other, desired, lines.
I E E E Journal on Selected Topics in Quantum Electronics, 2013, Vol 19, Issue 3