Thermally controllable reduction of absorption and extinction of a dielectric sphere by an InSb coating

Hamad M. Alkhoori; Akhlesh Lakhtakia

doi:10.1016/j.ijleo.2022.168992

Thermally controllable reduction of absorption and extinction of a dielectric sphere by an InSb coating

Hamad M. Alkhoori, Akhlesh Lakhtakia

Department of Electrical and Communication Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The absorption and extinction efficiencies of a sphere covered by InSb coating and illuminated by an incident plane wave in the terahertz gap were computed. Numerical results shows that these efficiencies, for some core materials and in some spectral regimes, can be reduced by adjusting the temperature. This, reduction of absorption and extinction by the InSb coating is not possible for air and metallic spheres, but it is possible for dielectric spheres. Furthermore, the InSb coating is more effective in absorption reduction for more dissipative dielectric materials, whereas it is more effective in extinction reduction for less dissipative dielectric materials.

Original language	English
Article number	168992
Journal	Optik
Volume	260
DOIs	https://doi.org/10.1016/j.ijleo.2022.168992
Publication status	Published - Jun 2022

Keywords

Electromagnetic absorption
Electromagnetic scattering
Terahertz gap

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1016/j.ijleo.2022.168992

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title = "Thermally controllable reduction of absorption and extinction of a dielectric sphere by an InSb coating",

abstract = "The absorption and extinction efficiencies of a sphere covered by InSb coating and illuminated by an incident plane wave in the terahertz gap were computed. Numerical results shows that these efficiencies, for some core materials and in some spectral regimes, can be reduced by adjusting the temperature. This, reduction of absorption and extinction by the InSb coating is not possible for air and metallic spheres, but it is possible for dielectric spheres. Furthermore, the InSb coating is more effective in absorption reduction for more dissipative dielectric materials, whereas it is more effective in extinction reduction for less dissipative dielectric materials.",

keywords = "Electromagnetic absorption, Electromagnetic scattering, Terahertz gap",

author = "Alkhoori, {Hamad M.} and Akhlesh Lakhtakia",

note = "Funding Information: H. M. Alkhoori acknowledges the United Arab Emirates University for funding this work. A. Lakhtakia is grateful to the Charles Godfrey Binder Endowment for ongoing support of his research activities. Publisher Copyright: {\textcopyright} 2022 Elsevier GmbH",

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doi = "10.1016/j.ijleo.2022.168992",

language = "English",

volume = "260",

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TY - JOUR

T1 - Thermally controllable reduction of absorption and extinction of a dielectric sphere by an InSb coating

AU - Alkhoori, Hamad M.

AU - Lakhtakia, Akhlesh

N1 - Funding Information: H. M. Alkhoori acknowledges the United Arab Emirates University for funding this work. A. Lakhtakia is grateful to the Charles Godfrey Binder Endowment for ongoing support of his research activities. Publisher Copyright: © 2022 Elsevier GmbH

PY - 2022/6

Y1 - 2022/6

N2 - The absorption and extinction efficiencies of a sphere covered by InSb coating and illuminated by an incident plane wave in the terahertz gap were computed. Numerical results shows that these efficiencies, for some core materials and in some spectral regimes, can be reduced by adjusting the temperature. This, reduction of absorption and extinction by the InSb coating is not possible for air and metallic spheres, but it is possible for dielectric spheres. Furthermore, the InSb coating is more effective in absorption reduction for more dissipative dielectric materials, whereas it is more effective in extinction reduction for less dissipative dielectric materials.

AB - The absorption and extinction efficiencies of a sphere covered by InSb coating and illuminated by an incident plane wave in the terahertz gap were computed. Numerical results shows that these efficiencies, for some core materials and in some spectral regimes, can be reduced by adjusting the temperature. This, reduction of absorption and extinction by the InSb coating is not possible for air and metallic spheres, but it is possible for dielectric spheres. Furthermore, the InSb coating is more effective in absorption reduction for more dissipative dielectric materials, whereas it is more effective in extinction reduction for less dissipative dielectric materials.

KW - Electromagnetic absorption

KW - Electromagnetic scattering

KW - Terahertz gap

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DO - 10.1016/j.ijleo.2022.168992

M3 - Article

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SN - 0030-4026

VL - 260

JO - Optik

JF - Optik

M1 - 168992

ER -

Thermally controllable reduction of absorption and extinction of a dielectric sphere by an InSb coating

Abstract

Keywords

ASJC Scopus subject areas

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