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Measurements of microwave scattering by ultrasound in air at oblique incidence

Wingren, Niklas LU and Sjöberg, Daniel LU orcid (2020) In Europhysics Letters 131(5).
Abstract
Scattering of electromagnetic waves against acoustic waves has been studied in acousto-optics and radio acoustic sounding of the atmosphere, among others. Strong interaction requires phase matching, which occurs at two angles between waves. These depend on the wavelength ratio. The scattered electromagnetic wave is frequency shifted by the acoustic frequency, either up or down depending on the angle between waves. This work presents experimental verification of this scattering for 27.3 GHz microwaves and 40 kHz ultrasound in air. Both up- and down-shifting of the scattered wave is shown. Previous work has mostly focused on either nearly perpendicular or parallel incidence. In contrast, this work considers oblique incidence with frequencies... (More)
Scattering of electromagnetic waves against acoustic waves has been studied in acousto-optics and radio acoustic sounding of the atmosphere, among others. Strong interaction requires phase matching, which occurs at two angles between waves. These depend on the wavelength ratio. The scattered electromagnetic wave is frequency shifted by the acoustic frequency, either up or down depending on the angle between waves. This work presents experimental verification of this scattering for 27.3 GHz microwaves and 40 kHz ultrasound in air. Both up- and down-shifting of the scattered wave is shown. Previous work has mostly focused on either nearly perpendicular or parallel incidence. In contrast, this work considers oblique incidence with frequencies differing from those used in acousto-optics and radio acoustic sounding.

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Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Europhysics Letters
volume
131
issue
5
article number
54003
publisher
EDP Sciences
external identifiers
  • scopus:85092634547
ISSN
1286-4854
DOI
10.1209/0295-5075/131/54003
language
English
LU publication?
yes
id
1ae6f951-a68d-4e1c-94f6-4d5d010eae9f
date added to LUP
2020-09-25 11:37:10
date last changed
2024-01-02 18:40:41
@article{1ae6f951-a68d-4e1c-94f6-4d5d010eae9f,
  abstract     = {{Scattering of electromagnetic waves against acoustic waves has been studied in acousto-optics and radio acoustic sounding of the atmosphere, among others. Strong interaction requires phase matching, which occurs at two angles between waves. These depend on the wavelength ratio. The scattered electromagnetic wave is frequency shifted by the acoustic frequency, either up or down depending on the angle between waves. This work presents experimental verification of this scattering for 27.3 GHz microwaves and 40 kHz ultrasound in air. Both up- and down-shifting of the scattered wave is shown. Previous work has mostly focused on either nearly perpendicular or parallel incidence. In contrast, this work considers oblique incidence with frequencies differing from those used in acousto-optics and radio acoustic sounding.<br/><br/>}},
  author       = {{Wingren, Niklas and Sjöberg, Daniel}},
  issn         = {{1286-4854}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{5}},
  publisher    = {{EDP Sciences}},
  series       = {{Europhysics Letters}},
  title        = {{Measurements of microwave scattering by ultrasound in air at oblique incidence}},
  url          = {{https://lup.lub.lu.se/search/files/88068177/acoustoEM_letter_publ.pdf}},
  doi          = {{10.1209/0295-5075/131/54003}},
  volume       = {{131}},
  year         = {{2020}},
}