Strong spatial dispersion in time-modulated dielectric media
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Título
Strong spatial dispersion in time-modulated dielectric mediaAutoría
Fecha de publicación
2020Editor
American Physical SocietyISSN
2469-9950; 2469-9969Cita bibliográfica
TORRENT, Dani. Strong spatial dispersion in time-modulated dielectric media. Physical Review B, 2020, vol. 102, no 21, p. 214202.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.214202Versión
info:eu-repo/semantics/publishedVersionResumen
We present an effective medium description of time-modulated dielectric media. By taking the averaged fields
over one modulation period, the relationship between them is derived, therefore defining the different ... [+]
We present an effective medium description of time-modulated dielectric media. By taking the averaged fields
over one modulation period, the relationship between them is derived, therefore defining the different constitutive
parameters. In the most general situation, it is found that the effective material is described by means of a
spatially and temporally dispersive transverse dielectric function and a constant longitudinal dielectric function.
It has been also found that the frequency dependence in the former is weak, in comparison with its wavenumber
dependence (spatial dispersion). Different physical consequences of this spatial dispersion are discussed, with
special emphasis on the weak dispersion approximation and the limit in which it is found that the effective
material behaves as a resonant and isotropic magnetodielectric medium with no additional longitudinal mode,
as it is commonly found in spatially dispersive materials. Time-dependent media therefore opens an alternative
way of designing dynamically tunable metamaterials [-]
Publicado en
Physical Review B, 2020, vol. 102, no 21.Entidad financiadora
Ministerio de Ciencia, Innovación y Universidades
Código del proyecto o subvención
RTI2018-093921-A-C42 | RYC-2016-21188
Derechos de acceso
©2020 American Physical Society
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