Strong spatial dispersion in time-modulated dielectric media
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Strong spatial dispersion in time-modulated dielectric mediaAutoria
Data de publicació
2020Editor
American Physical SocietyISSN
2469-9950; 2469-9969Cita bibliogràfica
TORRENT, Dani. Strong spatial dispersion in time-modulated dielectric media. Physical Review B, 2020, vol. 102, no 21, p. 214202.Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.214202Versió
info:eu-repo/semantics/publishedVersionResum
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 [-]
Publicat a
Physical Review B, 2020, vol. 102, no 21.Entitat finançadora
Ministerio de Ciencia, Innovación y Universidades
Codi del projecte o subvenció
RTI2018-093921-A-C42 | RYC-2016-21188
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©2020 American Physical Society
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info:eu-repo/semantics/openAccess
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info:eu-repo/semantics/openAccess
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