Role of multiple scattering in single particle perturbations in absorbing random media
File(s)
Published version
Author(s)
Berk, Joel
Foreman, Matthew R
Type
Journal Article
Abstract
Speckle patterns produced by disordered scattering systems exhibit a
sensitivity to addition of individual particles which can be used for sensing
applications. Using a coupled dipole model we investigate how multiple
scattering can enhance field perturbations arising in such random scattering
based sensors. Three distinct families of multiple scattering paths are shown
to contribute and the corresponding complex enhancement factors derived.
Probability distributions of individual enhancement factors over the complex
plane are characterised numerically within the context of surface plasmon
polariton scattering in which absorption is shown to play an important role. We
show that enhancements become more strongly dependent on individual scatterer
properties when absorption losses are larger, however, amplitude enhancements
$\sim 10^2$, comparable to low loss surface plasmons, are achievable through
sensor optimisation. Approximate analytic expressions for the complex mean
enhancements are also found, which agree well with simulations when loop
contributions are negligible.
sensitivity to addition of individual particles which can be used for sensing
applications. Using a coupled dipole model we investigate how multiple
scattering can enhance field perturbations arising in such random scattering
based sensors. Three distinct families of multiple scattering paths are shown
to contribute and the corresponding complex enhancement factors derived.
Probability distributions of individual enhancement factors over the complex
plane are characterised numerically within the context of surface plasmon
polariton scattering in which absorption is shown to play an important role. We
show that enhancements become more strongly dependent on individual scatterer
properties when absorption losses are larger, however, amplitude enhancements
$\sim 10^2$, comparable to low loss surface plasmons, are achievable through
sensor optimisation. Approximate analytic expressions for the complex mean
enhancements are also found, which agree well with simulations when loop
contributions are negligible.
Date Issued
2021-08-02
Date Acceptance
2021-07-16
Citation
Physical Review Research, 2021, 3 (033111), pp.1-14
ISSN
2643-1564
Publisher
American Physical Society
Start Page
1
End Page
14
Journal / Book Title
Physical Review Research
Volume
3
Issue
033111
Copyright Statement
© 2021 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Sponsor
The Royal Society
Royal Society
Engineering and Physical Sciences Research Council
Identifier
http://arxiv.org/abs/2105.02800v2
Grant Number
UF150335
University Research Fellowship
1992728
Subjects
physics.optics
physics.optics
cond-mat.dis-nn
cond-mat.mes-hall
Notes
Supplementary Movies provided
Publication Status
Published
Date Publish Online
2021-08-02