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Finite-difference time-domain simulation of wave transmission through space-time-varying media

Finite-difference time-domain simulation of wave transmission through space-time-varying media
Finite-difference time-domain simulation of wave transmission through space-time-varying media
A comprehensive study on the Finite Difference Time Domain (FDTD) numerical modelling of space- and time-varying media is presented. We investigate the dynamic behavior of oblique incidence of both TM and TE electromagnetic fields on space-timemodulated gratings. In their general form, these media have electrical permittivity, magnetic permeability, and electrical conductivity modulated across both space and time. We provide the FDTDschemes, the Courant-Friedrichs-Lewy (CFL) stability condition and equations for both TM and TE wave illuminations of space-time-varying slabs, along with the boundary conditions for the FDTD scheme. Furthermore, with engaging illustrative examples, we showcase the versatility and applications of space-time-varying media.
physics.optics, physics.app-ph
arXiv
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Kishk, Ahmed A
07e319d7-6a6d-4f10-9656-4cb11e63e25c
Eleftheriades, George V
280bbae6-32df-4af5-bcad-110f38ad72e7
Taravati, Sajjad
0026f25d-c919-4273-b956-8fe9795b31ce
Kishk, Ahmed A
07e319d7-6a6d-4f10-9656-4cb11e63e25c
Eleftheriades, George V
280bbae6-32df-4af5-bcad-110f38ad72e7

[Unknown type: UNSPECIFIED]

Record type: UNSPECIFIED

Abstract

A comprehensive study on the Finite Difference Time Domain (FDTD) numerical modelling of space- and time-varying media is presented. We investigate the dynamic behavior of oblique incidence of both TM and TE electromagnetic fields on space-timemodulated gratings. In their general form, these media have electrical permittivity, magnetic permeability, and electrical conductivity modulated across both space and time. We provide the FDTDschemes, the Courant-Friedrichs-Lewy (CFL) stability condition and equations for both TM and TE wave illuminations of space-time-varying slabs, along with the boundary conditions for the FDTD scheme. Furthermore, with engaging illustrative examples, we showcase the versatility and applications of space-time-varying media.

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2409.19923v1 - Author's Original
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2409.19923v2
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Published date: 30 September 2024
Keywords: physics.optics, physics.app-ph
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Identifiers

Local EPrints ID: 495596
URI: http://eprints.soton.ac.uk/id/eprint/495596
DOI: doi:10.48550/arXiv.2409.19923
PURE UUID: 51b3e1cc-8b8a-4b20-a843-59a5be3d8578
ORCID for Sajjad Taravati: ORCID iD orcid.org/0000-0003-3992-0050

Catalogue record

Date deposited: 19 Nov 2024 17:34
Last modified: 20 Dec 2024 03:08

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Contributors

Author: Sajjad Taravati ORCID iD
Author: Ahmed A Kishk
Author: George V Eleftheriades

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