Stefanini_Boundary Time discontinuities_PrePrint version_v1.pdf (474.38 kB)
Download fileTemporal interfaces and metamaterial response enabled by boundaries
preprint
posted on 2021-05-14, 13:38 authored by Luca StefaniniLuca Stefanini, Davide RamacciaDavide Ramaccia, Filiberto Bilotti, Alessandro ToscanoIn the last years, temporal metamaterials have been
exploited as a novel platform for conceiving several
electromagnetic and optical devices based on the
anomalous scattering response achieved at a single or
multiple sudden change of their medium properties,
which however is difficult to carry out in a realistic
scenario In this letter we investigate on the possibility to
emulate the scattering response of a temporal
metamaterial without acting on the medium properties,
but on the effective refractive index and wave impedance
perceived by the wave during the propagation within a
guiding structure rather than the actual material, by
acting on its boundaries. The work presents in closed
form the scattering coefficients achieved when the
boundary properties are suddenly modified for inducing
an effective temporal interface. In this framework,
temporally controlled metasurfaces can be used to
implement the proposed concept, giving an easier path
also to the design and realization of novel devices at
microwave and optical frequencies.
History
Email Address of Submitting Author
luc.stefanini@stud.uniroma3.itSubmitting Author's Institution
RomaTre UniversitySubmitting Author's Country
- Italy