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- Filippo Capolino, Donald R. Wilton, William A. Johnson
- J. Comput. Physics
- 2007

The Ewald method is applied to accelerate the evaluation of the Green's function (GF) of an infinite equispaced linear array of point sources with linear phasing. Only a few terms are needed to evaluate Ewald sums, which are cast in terms of error functions and exponential integrals, to high accuracy. It is shown analytically that the choice of the standard… (More)

- A. Lee Swindlehurst, Ender Ayanoglu, Payam Heydari, Filippo Capolino
- IEEE Communications Magazine
- 2014

- A Della Villa, S Enoch, G Tayeb, V Pierro, V Galdi, F Capolino
- Physical review letters
- 2005

This Letter presents a study of the local density of states (LDOS) in photonic quasicrystals. We show that the LDOS of a Penrose-type quasicrystal exhibits small additional band gaps. Among the band gaps, some exhibit a behavior similar to that typical of photonic crystals, while others do not. The development of certain band gaps requires large-size… (More)

- Mohamed A K Othman, Caner Guclu, Filippo Capolino
- Optics express
- 2013

We investigate a novel implementation of hyperbolic metamaterial (HM) at far-infrared frequencies composed of stacked graphene sheets separated by thin dielectric layers. Using the surface conductivity model of graphene, we derive the homogenization formula for the multilayer structure by treating graphene sheets as lumped layers with complex admittances.… (More)

- Qi Song, Salvatore Campione, Ozdal Boyraz, Filippo Capolino
- Optics express
- 2011

We propose a design of a dielectric (silicon nitride) optical leaky wave antenna (OLWA) with periodic semiconductor (silicon) corrugations, capable of producing narrow beam radiation. The optical antenna radiates a narrow beam because a leaky wave (LW) with low attenuation constant is excited at one end of the corrugated dielectric waveguide. We show that… (More)

- Alessandro Della Villa, Stefan Enoch, Gérard Tayeb, Filippo Capolino, Vincenzo Pierro, Vincenzo Galdi
- Optics express
- 2006

We investigate the properties of the resonant modes that occur in the transparency bands of two-dimensional finite-size Penrose-type photonic quasicrystals made of dielectric cylindrical rods. These modes stem from the natural local arrangements of the quasicrystal structure rather than, as originally thought, from fabrication-related imperfections.… (More)

- David R. Jackson, Paolo Burghignoli, +4 authors Arthur A. Oliner
- Proceedings of the IEEE
- 2011

[1] Accurate and efficient computation of periodic free-space Green's functions using the Ewald method is considered for three cases: a 1-D array of line sources, a 1-D array of point sources, and a 2-D array of point sources. A limitation on the numerical accuracy when using the ''optimum'' E parameter (which gives optimum asymptotic convergence) at high… (More)

- A. Benz, S. Campione, +7 authors I. Brener
- Nature communications
- 2013

The interaction between cavity modes and optical transitions leads to new coupled light-matter states in which the energy is periodically exchanged between the matter states and the optical mode. Here we present experimental evidence of optical strong coupling between modes of individual sub-wavelength metamaterial nanocavities and engineered optical… (More)