Reflection characteristics of a PML with a shallow corrugation

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
Publicado:	2003
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:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00189480_v51_n6_p1691_Inchaussandague 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	paper:paper_00189480_v51_n6_p1691_Inchaussandague
record_format	dspace
spelling	paper:paper_00189480_v51_n6_p1691_Inchaussandague2023-06-08T14:40:09Z Reflection characteristics of a PML with a shallow corrugation 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. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00189480_v51_n6_p1691_Inchaussandague 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 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.
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
publishDate	2003
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00189480_v51_n6_p1691_Inchaussandague http://hdl.handle.net/20.500.12110/paper_00189480_v51_n6_p1691_Inchaussandague
_version_	1768542157245775872

Reflection characteristics of a PML with a shallow corrugation

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