Passive and active nano-antenna systems

Pan Stanford Publishing
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Singular and Chiral Nanoplasmonics, 2015, pp. 409 - 450
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Interesting theoretical and practical radiation and scattering effects associated with passive and active core–shell nanoparticles (NPs) have been investigated and will be reviewed. Both plane wave and elementary Hertzian dipole excitations and a variety of gain media have been examined. Optimal configurations at visible wavelengths have been determined. Examples will illustrate how one can engineer these nano-scatterers to have cross-sections significantly larger than their geometrical size and how the corresponding nanoantenna structures can be matched to local quantum emitters to act as nano-amplifiers that significantly enhance the far-field responses. On the contrary, it will be shown how they can also be designed to actively jam these sources.
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