Reflection characteristics of a PML with a shallow corrugation

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The constitutive characteristics of anisotropic materials can be exploited to construct absorbers that provide reflectionless interfaces for waves at arbitrary angles of incidence. In this paper, we investigate how a weak corrugation affects the reflectivity of the anisotropic perfectly matched abso...

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Detalles Bibliográficos
Autores principales:	Inchaussandague, M.E., Gigli, M.L., Depine, R.A.
Formato:	JOUR
Materias:	Absorber Anisotropy Perfectly matched layer (PML) Reflectivity Scattering Boundary conditions Electromagnetic fields Electromagnetic wave polarization Electromagnetic wave scattering Linear equations Maxwell equations Perfectly matched layer Rayleigh method Electromagnetic wave reflection
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00189480_v51_n6_p1691_Inchaussandague
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00189480_v51_n6_p1691_Inchaussandague
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spelling	todo:paper_00189480_v51_n6_p1691_Inchaussandague2023-10-03T14:16:22Z Reflection characteristics of a PML with a shallow corrugation Inchaussandague, M.E. Gigli, M.L. Depine, R.A. Absorber Anisotropy Perfectly matched layer (PML) Reflectivity Scattering Boundary conditions Electromagnetic fields Electromagnetic wave polarization Electromagnetic wave scattering Linear equations Maxwell equations Absorber Perfectly matched layer Rayleigh method Electromagnetic wave reflection The constitutive characteristics of anisotropic materials can be exploited to construct absorbers that provide reflectionless interfaces for waves at arbitrary angles of incidence. In this paper, we investigate how a weak corrugation affects the reflectivity of the anisotropic perfectly matched absorber developed by Sacks et al. for a flat interface. To do so, we develop a Rayleigh method to calculate the fields diffracted at the periodically corrugated boundary of an anisotropic absorber with constant constitutive tensors, which correspond to a planar (Cartesian) perfectly matched layer. We present numerical results in the nondiffractive regime (where only a specularly reflected wave can propagate) for sinusoidal corrugations with different groove height-to-period ratios. Our results show that the reflectivity of the anisotropic absorber near normal incidence remains very low (less than 0.4% for a 10% modulation), whereas it changes dramatically near grazing incidences. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00189480_v51_n6_p1691_Inchaussandague
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Absorber Anisotropy Perfectly matched layer (PML) Reflectivity Scattering Boundary conditions Electromagnetic fields Electromagnetic wave polarization Electromagnetic wave scattering Linear equations Maxwell equations Absorber Perfectly matched layer Rayleigh method Electromagnetic wave reflection
spellingShingle	Absorber Anisotropy Perfectly matched layer (PML) Reflectivity Scattering Boundary conditions Electromagnetic fields Electromagnetic wave polarization Electromagnetic wave scattering Linear equations Maxwell equations Absorber Perfectly matched layer Rayleigh method Electromagnetic wave reflection Inchaussandague, M.E. Gigli, M.L. Depine, R.A. Reflection characteristics of a PML with a shallow corrugation
topic_facet	Absorber Anisotropy Perfectly matched layer (PML) Reflectivity Scattering Boundary conditions Electromagnetic fields Electromagnetic wave polarization Electromagnetic wave scattering Linear equations Maxwell equations Absorber Perfectly matched layer Rayleigh method Electromagnetic wave reflection
description	The constitutive characteristics of anisotropic materials can be exploited to construct absorbers that provide reflectionless interfaces for waves at arbitrary angles of incidence. In this paper, we investigate how a weak corrugation affects the reflectivity of the anisotropic perfectly matched absorber developed by Sacks et al. for a flat interface. To do so, we develop a Rayleigh method to calculate the fields diffracted at the periodically corrugated boundary of an anisotropic absorber with constant constitutive tensors, which correspond to a planar (Cartesian) perfectly matched layer. We present numerical results in the nondiffractive regime (where only a specularly reflected wave can propagate) for sinusoidal corrugations with different groove height-to-period ratios. Our results show that the reflectivity of the anisotropic absorber near normal incidence remains very low (less than 0.4% for a 10% modulation), whereas it changes dramatically near grazing incidences.
format	JOUR
author	Inchaussandague, M.E. Gigli, M.L. Depine, R.A.
author_facet	Inchaussandague, M.E. Gigli, M.L. Depine, R.A.
author_sort	Inchaussandague, M.E.
title	Reflection characteristics of a PML with a shallow corrugation
title_short	Reflection characteristics of a PML with a shallow corrugation
title_full	Reflection characteristics of a PML with a shallow corrugation
title_fullStr	Reflection characteristics of a PML with a shallow corrugation
title_full_unstemmed	Reflection characteristics of a PML with a shallow corrugation
title_sort	reflection characteristics of a pml with a shallow corrugation
url	http://hdl.handle.net/20.500.12110/paper_00189480_v51_n6_p1691_Inchaussandague
work_keys_str_mv	AT inchaussandagueme reflectioncharacteristicsofapmlwithashallowcorrugation AT gigliml reflectioncharacteristicsofapmlwithashallowcorrugation AT depinera reflectioncharacteristicsofapmlwithashallowcorrugation
_version_	1807324048931160064

Reflection characteristics of a PML with a shallow corrugation

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