Abstract
Surface plasmons polaritons are collective excitations of an electron gas that occur at an interface between negative-ε and positive-ε media. Here, we report the experimental observation of such surface waves using simple waveguide metamaterials filled only with available positive-ε media at microwave frequencies. In contrast to optical designs, in our setup the propagation length of the surface plasmons can be rather long as low loss conventional dielectrics are chosen to avoid typical losses from negative-ε media. Plasmonic phenomena have potential applications in enhancing light–matter interactions, implementing nanoscale photonic circuits and integrated photonics.
Highlights
Surface plasmon polaritons (SPPs) are guided electromagnetic waves at the interface between two materials where the real part of the permittivity changes its sign across the interface [1, 2]
Negative permittivity media are the key components in the exciting field of plasmonics and metamaterials [1,2,3,4,5], they typically do suffer from strong losses
Single interface plasmons have been experimentally verified at microwave frequencies through waveguide structures involving only conventional low loss positive-epsilon dielectrics
Summary
Filipa R Prudêncio1,2 , Jorge R Costa1,2 , Carlos A Fernandes , Nader Engheta and Mário G Silveirinha. Surface plasmons polaritons are collective excitations of an electron gas that occur at an interface licence. We report the experimental observation of such. Any further distribution of this work must maintain surface waves using simple waveguide metamaterials filled only with available positive-ε media at attribution to the microwave frequencies. In contrast to optical designs, in our setup the propagation length of the author(s) and the title of the work, journal citation surface plasmons can be rather long as low loss conventional dielectrics are chosen to avoid typical and DOI. Plasmonic phenomena have potential applications in enhancing light–. Matter interactions, implementing nanoscale photonic circuits and integrated photonics
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