Optical theorems and physical bounds on absorption in lossy media
Ivanenko, Yevhen LU ; Gustafsson, Mats LU
and Nordebo, Sven
LU
(2019)
In Optics Express
27(23).
p.34323-34342
- Abstract
Two different versions of an optical theorem for a scattering body embedded inside a lossy background medium are derived in this paper. The corresponding fundamental upper bounds on absorption are then obtained in closed form by elementary optimization techniques. The first version is formulated in terms of polarization currents (or equivalent currents) inside the scatterer and generalizes previous results given for a lossless medium. The corresponding bound is referred to here as a variational bound and is valid for an arbitrary geometry with a given material property. The second version is formulated in terms of the T-matrix parameters of an arbitrary linear scatterer circumscribed by a spherical volume and gives a new fundamental... (More)
Two different versions of an optical theorem for a scattering body embedded inside a lossy background medium are derived in this paper. The corresponding fundamental upper bounds on absorption are then obtained in closed form by elementary optimization techniques. The first version is formulated in terms of polarization currents (or equivalent currents) inside the scatterer and generalizes previous results given for a lossless medium. The corresponding bound is referred to here as a variational bound and is valid for an arbitrary geometry with a given material property. The second version is formulated in terms of the T-matrix parameters of an arbitrary linear scatterer circumscribed by a spherical volume and gives a new fundamental upper bound on the total absorption of an inclusion with an arbitrary material property (including general bianisotropic materials). The two bounds are fundamentally different as they are based on different assumptions regarding the structure and the material property. Numerical examples including homogeneous and layered (core-shell) spheres are given to demonstrate that the two bounds provide complimentary information in a given scattering problem.
(Less)
- author
- Ivanenko, Yevhen
LU
; Gustafsson, Mats
LU
and Nordebo, Sven
LU
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Optics Express
- volume
- 27
- issue
- 23
- pages
- 20 pages
- publisher
- Optical Society of America
- external identifiers
-
- pmid:31878482
- scopus:85075267678
- ISSN
- 1094-4087
- DOI
- 10.1364/OE.27.034323
- language
- English
- LU publication?
- yes
- id
- 70abef60-50a7-479a-b9fd-78809b5f022f
- date added to LUP
- 2019-12-05 09:33:56
- date last changed
- 2024-06-12 05:56:04
@article{70abef60-50a7-479a-b9fd-78809b5f022f,
abstract = {{<p>Two different versions of an optical theorem for a scattering body embedded inside a lossy background medium are derived in this paper. The corresponding fundamental upper bounds on absorption are then obtained in closed form by elementary optimization techniques. The first version is formulated in terms of polarization currents (or equivalent currents) inside the scatterer and generalizes previous results given for a lossless medium. The corresponding bound is referred to here as a variational bound and is valid for an arbitrary geometry with a given material property. The second version is formulated in terms of the T-matrix parameters of an arbitrary linear scatterer circumscribed by a spherical volume and gives a new fundamental upper bound on the total absorption of an inclusion with an arbitrary material property (including general bianisotropic materials). The two bounds are fundamentally different as they are based on different assumptions regarding the structure and the material property. Numerical examples including homogeneous and layered (core-shell) spheres are given to demonstrate that the two bounds provide complimentary information in a given scattering problem.</p>}},
author = {{Ivanenko, Yevhen and Gustafsson, Mats and Nordebo, Sven}},
issn = {{1094-4087}},
language = {{eng}},
number = {{23}},
pages = {{34323--34342}},
publisher = {{Optical Society of America}},
series = {{Optics Express}},
title = {{Optical theorems and physical bounds on absorption in lossy media}},
url = {{http://dx.doi.org/10.1364/OE.27.034323}},
doi = {{10.1364/OE.27.034323}},
volume = {{27}},
year = {{2019}},
}