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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…
Comment on "Repulsive Casimir Force in Chiral Metamaterials"
M. G. Silveirinha, S. I. Maslovski
It is shown that the proposal of Ref. [1] of Casimir repulsion and nanolevitation based on chiral metamaterials is incompatible with the passivity and causality of the materials.
Non-local permittivity from a quasi-static model for a class of wire media
Stanislav I. Maslovski, Mário G. Silveirinha
A simple quasi-static model applicable to a wide class of wire media is developed that explains strong non-locality in the dielectric response of wire media in clear physical terms…
Finite-difference frequency-domain method for the extraction of effective parameters of metamaterials
Joao T. Costa, Mario G. Silveirinha, Stanislav I. Maslovski
Here, we report a numerical implementation of the nonlocal homogenization approach recently proposed in [M. Silveirinha, Phys. Rev. B 75, 115104 (2007)], using the finite differenc…