26 citations · 70 across the 6 of their papers we have counts for
6 papers
Thin-Film Metamaterials called Sculptured Thin Films
Akhlesh Lakhtakia, Joseph B. Geddes
Morphology and performance are conjointed attributes of metamaterials, of which sculptured thin films (STFs) are examples. STFs are assemblies of nanowires that can be fabricated f…
On the inapplicability of a negative-phase-velocity condition as a negative-refraction condition for active materials
A. Lakhtakia, T. G. Mackay, J. B. Geddes
A negative-phase-velocity condition derived by Depine and Lakhtakia [Microwave Opt Technol Lett 41 (2004) 315] for isotropic, homogeneous, passive, dielectric-magnetic materials is…
When does the choice of the refractive index of a linear, homogeneous, isotropic, active, dielectric medium matter?
Akhlesh Lakhtakia, Joseph B. Geddes, Tom G. Mackay
Two choices are possible for the refractive index of a linear, homogeneous, isotropic, active, dielectric material. Either of the choices is adequate for obtaining frequency-domain…
On the refractive index for a nonmagnetic two-component medium: resolution of a controversy
Joseph B. Geddes, Tom G. Mackay, Akhlesh Lakhtakia
The refractive index of a dielectric medium comprising both passive and inverted components in its permittivity was determined using two methods: (i) in the time domain, a finite-d…
Swamping of circular Bragg phenomenon and shaping of videopulses
Joseph B. Geddes, Akhlesh Lakhtakia
We studied the durations and average speeds of videopulses transmitted through chiral sculptured thin films using a finite-difference algorithm. The chiral STF was either linear or…
Scattering by a nihility cylinder
A. Lakhtakia, J. B. Geddes
The total scattering and the extinction efficiencies of a nihility cylinder of infinite length and circular cross--section are identical and independent of the polarization state o…