Zobrazeno 1 - 10
of 547
pro vyhledávání: '"Galdi, Vincenzo"'
Autor:
Rizza, Carlo, Vincenti, Maria Antonietta, Castaldi, Giuseppe, Contestabile, Alessandra, Galdi, Vincenzo, Scalora, Michael
Space-time modulation of electromagnetic parameters offers novel exciting possibilities for advanced field manipulations. In this study, we explore wave scattering from a time-varying interface characterized by a Lorentz-type dispersion with a step-l
Externí odkaz:
http://arxiv.org/abs/2409.01831
A novel technology based on stacked intelligent metasurfaces (SIM) has recently emerged. This platform involves cascading multiple metasurfaces, each acting as a digitally programmable physical layer within a diffractive neural network. SIM enable th
Externí odkaz:
http://arxiv.org/abs/2408.16606
Wireless networks are undergoing a transformative shift, driven by the crucial factors of cost effectiveness and sustainability. Digital coding metasurfaces (DCMs) might play a key role in realizing cost-effective digital modulators by harnessing ene
Externí odkaz:
http://arxiv.org/abs/2406.10826
Autor:
Zhou, Cheng-Long, Peng, Yu-Chen, Zhang, Yong, Yi, Hong-Liang, Antezza, Mauro, Galdi, Vincenzo
We explore a novel approach to achieving anisotropic thermal photon tunneling, inspired by the concept of parity-time symmetry in quantum physics. Our method leverages the modulation of constitutive optical parameters, oscillating between loss and ga
Externí odkaz:
http://arxiv.org/abs/2405.16109
Autor:
Lovat, Giampiero, Fuscaldo, Walter, Moccia, Massimo, Castaldi, Giuseppe, Galdi, Vincenzo, Burghignoli, Paolo
A rigorous full-wave modal analysis based on the method of moments in the spectral domain is presented for line waveguides constituted by two-part impedance planes with arbitrary anisotropic surface impedances. An integral equation is formulated by i
Externí odkaz:
http://arxiv.org/abs/2305.17981
Publikováno v:
ACS Photonics, 2023
Time-harmonic electromagnetic plane waves in anisotropic media can exhibit complex-valued wavevectors (with nonzero real and imaginary parts) even in the absence of material dissipation. These peculiar modes, usually referred to as "ghost waves," hyb
Externí odkaz:
http://arxiv.org/abs/2305.15789
Until now, researchers in wireless communications have mainly focused their attention on slowly time-varying designs of reconfigurable intelligent surfaces (RISs), where the spatial-phase gradient across the RIS is varied at the rate equal to the inv
Externí odkaz:
http://arxiv.org/abs/2304.11912
Publikováno v:
Nanophotonics, ahead of print, 2023
Temporal metamaterials, based on time-varying constitutive properties, offer new exciting possibilities for advanced field manipulations. In this study, we explore the capabilities of anisotropic temporal slabs, which rely on abrupt changes in time f
Externí odkaz:
http://arxiv.org/abs/2302.05153
Publikováno v:
Applied Physics Letters, vol. 122, No. 2, 021701 (2023)
Recently, it has been shown that temporal metamaterials based on impulsive modulations of the constitutive parameters (of duration much smaller than a characteristic electromagnetic timescale) may exhibit a nonlocal response that can be harnessed so
Externí odkaz:
http://arxiv.org/abs/2212.08336
Recently, a circuits-based approach for modeling the mutual coupling of reconfigurable surfaces, which comprise sub-wavelength spaced passive scattering elements coupled with electronic circuits for enabling the reconfiguration of the surface, has be
Externí odkaz:
http://arxiv.org/abs/2210.08619