Resonant Scattering Characteristics of Homogeneous Dielectric Sphere

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Resonant Scattering Characteristics of Homogeneous Dielectric Sphere. / Tzarouchis, Dimitrios; Ylä-Oijala, Pasi; Sihvola, Ari.

In: IEEE Transactions on Antennas and Propagation, Vol. 65, No. 6, 7891061, 2017, p. 3184-3191.

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@article{a3a66c2ad1b0419eb84a82b18beb781c,
title = "Resonant Scattering Characteristics of Homogeneous Dielectric Sphere",
abstract = "In this paper, the classical problem of electromagnetic scattering by a single homogeneous sphere is revisited. Main focus is the study of the scattering behavior as a function of the material contrast and the size parameters for all electric and magnetic resonances of a dielectric sphere. Specifically, the Padé approximants are introduced and utilized as an alternative system expansion of the Mie coefficients. Low order Padé approximants can give compact and physically insightful expressions for the scattering system and the enabled dynamic mechanisms. Higher order approximants are used for predicting accurately the resonant pole spectrum. These results are summarized into general pole formulae, covering up to fifth order magnetic and forth order electric resonances of a small dielectric sphere. Additionally, the connection between the radiative damping process and the resonant linewidth is investigated. The results obtained reveal the fundamental connection of the radiative damping mechanism with the maximum width occurring for each resonance. Finally, the suggested system ansatz is used for studying the resonant absorption maximum through a circuit-inspired perspective.",
keywords = "Light scattering, Lorenz-Mie theory, Mie coefficients, Pad{\'e} approximants, Radiative damping",
author = "Dimitrios Tzarouchis and Pasi Yl{\"a}-Oijala and Ari Sihvola",
year = "2017",
doi = "10.1109/TAP.2017.2690312",
language = "English",
volume = "65",
pages = "3184--3191",
journal = "IEEE Transactions on Antennas & Propagation",
issn = "0018-926X",
number = "6",

}

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TY - JOUR

T1 - Resonant Scattering Characteristics of Homogeneous Dielectric Sphere

AU - Tzarouchis, Dimitrios

AU - Ylä-Oijala, Pasi

AU - Sihvola, Ari

PY - 2017

Y1 - 2017

N2 - In this paper, the classical problem of electromagnetic scattering by a single homogeneous sphere is revisited. Main focus is the study of the scattering behavior as a function of the material contrast and the size parameters for all electric and magnetic resonances of a dielectric sphere. Specifically, the Padé approximants are introduced and utilized as an alternative system expansion of the Mie coefficients. Low order Padé approximants can give compact and physically insightful expressions for the scattering system and the enabled dynamic mechanisms. Higher order approximants are used for predicting accurately the resonant pole spectrum. These results are summarized into general pole formulae, covering up to fifth order magnetic and forth order electric resonances of a small dielectric sphere. Additionally, the connection between the radiative damping process and the resonant linewidth is investigated. The results obtained reveal the fundamental connection of the radiative damping mechanism with the maximum width occurring for each resonance. Finally, the suggested system ansatz is used for studying the resonant absorption maximum through a circuit-inspired perspective.

AB - In this paper, the classical problem of electromagnetic scattering by a single homogeneous sphere is revisited. Main focus is the study of the scattering behavior as a function of the material contrast and the size parameters for all electric and magnetic resonances of a dielectric sphere. Specifically, the Padé approximants are introduced and utilized as an alternative system expansion of the Mie coefficients. Low order Padé approximants can give compact and physically insightful expressions for the scattering system and the enabled dynamic mechanisms. Higher order approximants are used for predicting accurately the resonant pole spectrum. These results are summarized into general pole formulae, covering up to fifth order magnetic and forth order electric resonances of a small dielectric sphere. Additionally, the connection between the radiative damping process and the resonant linewidth is investigated. The results obtained reveal the fundamental connection of the radiative damping mechanism with the maximum width occurring for each resonance. Finally, the suggested system ansatz is used for studying the resonant absorption maximum through a circuit-inspired perspective.

KW - Light scattering

KW - Lorenz-Mie theory

KW - Mie coefficients

KW - Padé approximants

KW - Radiative damping

UR - http://www.scopus.com/inward/record.url?scp=85021695807&partnerID=8YFLogxK

U2 - 10.1109/TAP.2017.2690312

DO - 10.1109/TAP.2017.2690312

M3 - Article

VL - 65

SP - 3184

EP - 3191

JO - IEEE Transactions on Antennas & Propagation

JF - IEEE Transactions on Antennas & Propagation

SN - 0018-926X

IS - 6

M1 - 7891061

ER -

ID: 11624463