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Plasmonics without negative dielectrics
Cristian Della Giovampaola, Nader Engheta
Plasmonic phenomena are exhibited in light-matter interaction involving materials whose real parts of permittivity functions attain negative values at operating wavelengths. Howeve…
Digital Metamaterials
Cristian Della Giovampaola, Nader Engheta
Balancing the complexity and the simplicity has played an important role in the development of many fields in science and engineering. As Albert Einstein was once quoted to say: 'E…
Giant nonlinearity in Zero-Gap Semiconductor Superlattices
Mário G. Silveirinha, Nader Engheta
Using an effective medium approach, we describe how by combining mercury-cadmium-telluride semiconductor alloys with band gap energies of opposite signs it may be possible to desig…
An Effective Medium Approach to Electron Waves: Graphene Superlattices
Mario Silveirinha, Nader Engheta
We develop an effective medium approach to characterize the propagation of matter waves in periodic structures, such as graphene or semiconductor superlattices. It is proven that t…
Sampling and Squeezing Electromagnetic Waves through Subwavelength Ultranarrow Regions or Openings
Mario G. Silveirinha, Nader Engheta
Here, we investigate the physical mechanisms that may enable squeezing a complex electromagnetic field distribution through a narrow and/or partially obstructed region with little…
A Hertzian Plasmonic Nanodimer as an Efficient Optical Nanoantenna
Andrea Alu, Nader Engheta
Inspired by the geometry and shape of the classical radio-frequency radiator, the Hertzian dipole, here we analyze the design of a plasmonic optical dimer nanoantenna. We show how…