[HTML][HTML] Direct method for reconstructing the radiating part of a planar source from its far-fields

G Xiao, R Liu - Electronics, 2022 - mdpi.com
A planar current is generally divided into a radiating part that mainly generates propagation
fields and a non-radiating part that mainly generates evanescent fields. This paper proposes …

Finding a source inside a sphere

NL Tsitsas, PA Martin - Inverse Problems, 2011 - iopscience.iop.org
A sphere excited by an interior point source or a point dipole gives a simplified yet realistic
model for studying a variety of applications in medical imaging. We suppose that there is an …

Excitation of a layered medium by 𝑁 sources: Scattering relations, interaction cross sections and physical bounds

A Kalogeropoulos, N Tsitsas - Quarterly of Applied Mathematics, 2021 - ams.org
A layered medium is excited by $ N $ external or internal point sources. Boundary-value
problems for the generated acoustic waves are formulated. General scattering and optical …

Efficient progressive algorithm for light scattering of a multilayered concentric nanoparticle

R Li, BQ Li - Applied Optics, 2022 - opg.optica.org
An efficient progressive methodology is presented for the computation of multi-scattering of
electromagnetic waves by a multilayered concentric nanoparticle. Instead of solving a large …

Electromagnetic excitation of a spherical medium by an arbitrary dipole and related inverse problems

P Prokopiou, NL Tsitsas - Studies in Applied Mathematics, 2018 - Wiley Online Library
A piecewise homogeneous spherical medium is excited by an external or internal electric
dipole with arbitrary location and polarization. The dyadic Green's function of the medium is …

Direct and inverse dipole electromagnetic scattering by a piecewise homogeneous sphere

NL Tsitsas - ZAMM‐Journal of Applied Mathematics and …, 2009 - Wiley Online Library
This paper deals with the investigation of the direct and the inverse electromagnetic
scattering problem by a piecewise homogeneous sphere, excited by an interior or exterior …

Excitation of a layered sphere by 𝑁 acoustic sources: Exact solutions, low-frequency approximations, and inverse problems

A Kalogeropoulos, N Tsitsas - Quarterly of Applied Mathematics, 2023 - ams.org
Acoustic excitation of a layered sphere by $ N $ external and internal point sources is
considered. The direct problem is solved by developing a T-Matrix method leading to the …

Direct and inverse low‐frequency acoustic excitation of a layered sphere by an arbitrarily positioned point source

P Prokopiou, NL Tsitsas - Mathematical Methods in the Applied …, 2018 - Wiley Online Library
A layered sphere is excited by an acoustic point source arbitrarily located inside or outside
the sphere. First, the direct scattering problem is solved analytically by developing a …

A low-frequency electromagnetic near-field inverse problem for a spherical scatterer

NL Tsitsas - Journal of Computational Mathematics, 2013 - JSTOR
The interior low-frequency electromagnetic dipole excitation of a dielectric sphere is utilized
as a simplified but realistic model in various biomedicai applications. Motivated by these …

[HTML][HTML] Formulation of a T-Matrix Approach for a Piecewise-Homogeneous Anisotropic Medium Excited by a Spherical Sound Wave

A Kalogeropoulos, NL Tsitsas - Mathematics, 2023 - mdpi.com
A piecewise-homogeneous medium, consisting of anisotropic layers, is excited by a primary
spherical sound wave due to a point source lying in the exterior of the medium or in one of …