Ben-Hur V. Borges

TL;DR: The phase profiles of metalenses made of different dielectric materials and note the advantage of high refractive index materials are compared to help guide future developments in high-performance metalenses toward wide-field and high-resolution imaging.

TL;DR: In this article, metalenses are nanostructured surfaces that mimic the functionality of optical elements, and many exciting demonstrations have already been made, for example, focusing into diffraction-limited spots or...

TL;DR: Numerical simulations show a sharp resonance-derived spectral profile that is additionally shaped by a neighboring Rayleigh anomaly, and it is shown numerically that the narrow bandwidth is predominantly due to the low refractive-index contrast between the waveguide film and the substrate.

TL;DR: In this article, two split-field implementations of the perfectly matched layer (PML) for the unconditionally stable locally one-dimensional (LOD) finite-difference time-domain (FDTD) method are compared.

TL;DR: The axisymmetry present in the device geometry, fields, and sources is exploited to reduce the dimensionality of the problem from 3D to 2D to investigate the physical performance of VEDs designed to harness particle bunching effects arising from the coherent Cerenkov electron beam interactions within micro-machined slow wave structures.