6 papers · 1 filter
Gaussian pulse scattering by a chiral spherical shell
Hector M. Iga-Buitron, Tom G. Mackay, Akhlesh Lakhtakia
Theory was formulated for scattering by a coated chiral sphere of a plane wave of arbitrary polarization state with amplitude modulated by a Gaussian pulse. The spherical core and…
van de Hulst Essay: Geometric-phase portrayal of electromagnetic scattering by a three-dimensional object in free space
Akhlesh Lakhtakia
The concept of geometric phase was applied to initiate the geometric-phase portrayal of electromagnetic scattering by a three-dimensional object in free space. Whereas the incident…
Electromagnetic homogenization of particulate composite materials comprising spheroids and truncated spheroids with orientational distribution
Héctor M. Iga-Buitrón, Tom G. Mackay, Akhlesh Lakhtakia
Implementations of the Bruggeman and Maxwell Garnett homogenization formalisms were developed to estimate the relative permittivity dyadic of a homogenized composite material (HCM)…
The Circular Bragg Phenomenon Updated
Akhlesh Lakhtakia
The circular Bragg phenomenon is the circular-polarization-state-selective reflection of light in a spectral regime called the circular Bragg regime. In continuation of an exposito…
Geometric Phase and Nanoscale Architected Morphology of Reusch Piles
Akhlesh Lakhtakia
The geometric phase has acquired interest for optical devices such as achromatic phase shifters, spatial light modulators, frequency shifters, and planar lenses for wavefront engin…
Anisotropic homogenized composite mediums arising from truncated spheres, spheroids, and ellipsoids
Tom G. Mackay, Akhlesh Lakhtakia
Closed-form expressions were recently derived for depolarization dyadics for truncated spheres and truncated spheroids, and the formalism was extended to truncated ellipsoids. Thes…