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T-matrix method for closely adjacent obstacles

Martin, Torleif LU (2019) In Journal of Quantitative Spectroscopy and Radiative Transfer 234. p.40-46
Abstract

This paper presents a novel method to calculate the T-matrix for two non-spherical obstacles positioned close to each other, where the individual circumscribed spheres intersect. This is achieved by translating the obstacles coordinate systems, using translation matrices for spherical vector waves. The new circumscribing spheres enables the obstacles to be positioned close to each other. A new total T-matrix of the two-obstacle system can then be calculated using methods for composite particles, i.e., the superposition T-matrix method. This total T-matrix will generally be larger than the original ones, depending on the sizes of the circumscribing spheres used in the coordinate translation procedure. However, it is shown that the total... (More)

This paper presents a novel method to calculate the T-matrix for two non-spherical obstacles positioned close to each other, where the individual circumscribed spheres intersect. This is achieved by translating the obstacles coordinate systems, using translation matrices for spherical vector waves. The new circumscribing spheres enables the obstacles to be positioned close to each other. A new total T-matrix of the two-obstacle system can then be calculated using methods for composite particles, i.e., the superposition T-matrix method. This total T-matrix will generally be larger than the original ones, depending on the sizes of the circumscribing spheres used in the coordinate translation procedure. However, it is shown that the total T-matrix can be truncated after transformation to a common origin, without degrading the accuracy. The total truncated T-matrix is only slightly larger than the original individual ones. The method is demonstrated for electromagnetic scattering simulations of two metallic disks, closely adjacent to each other.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Disk, Electromagnetic, Scattering, T-matrix
in
Journal of Quantitative Spectroscopy and Radiative Transfer
volume
234
pages
7 pages
publisher
Elsevier
external identifiers
  • scopus:85067010039
ISSN
0022-4073
DOI
10.1016/j.jqsrt.2019.06.001
language
English
LU publication?
yes
id
fd76594b-acb2-4424-b14f-2c20e6846cf8
date added to LUP
2019-06-26 11:13:07
date last changed
2019-07-16 04:12:40
@article{fd76594b-acb2-4424-b14f-2c20e6846cf8,
  abstract     = {<p>This paper presents a novel method to calculate the T-matrix for two non-spherical obstacles positioned close to each other, where the individual circumscribed spheres intersect. This is achieved by translating the obstacles coordinate systems, using translation matrices for spherical vector waves. The new circumscribing spheres enables the obstacles to be positioned close to each other. A new total T-matrix of the two-obstacle system can then be calculated using methods for composite particles, i.e., the superposition T-matrix method. This total T-matrix will generally be larger than the original ones, depending on the sizes of the circumscribing spheres used in the coordinate translation procedure. However, it is shown that the total T-matrix can be truncated after transformation to a common origin, without degrading the accuracy. The total truncated T-matrix is only slightly larger than the original individual ones. The method is demonstrated for electromagnetic scattering simulations of two metallic disks, closely adjacent to each other.</p>},
  author       = {Martin, Torleif},
  issn         = {0022-4073},
  keyword      = {Disk,Electromagnetic,Scattering,T-matrix},
  language     = {eng},
  pages        = {40--46},
  publisher    = {Elsevier},
  series       = {Journal of Quantitative Spectroscopy and Radiative Transfer},
  title        = {T-matrix method for closely adjacent obstacles},
  url          = {http://dx.doi.org/10.1016/j.jqsrt.2019.06.001},
  volume       = {234},
  year         = {2019},
}