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Dispersive coherent Brillouin scattering spectroscopy

Frequency- and time-domain Brillouin scattering spectroscopy are powerful tools to read out the mechanical properties of complex systems in material and life sciences. Indeed, coherent acoustic phonons in the time-domain method offer superior depth resolution and a stronger signal than incoherent ac...

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Detalles Bibliográficos
Autores principales: Ishijima, Ayumu, Okabe, Shinga, Sakuma, Ichiro, Nakagawa, Keiichi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9806682/
https://www.ncbi.nlm.nih.gov/pubmed/36601363
http://dx.doi.org/10.1016/j.pacs.2022.100447
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author Ishijima, Ayumu
Okabe, Shinga
Sakuma, Ichiro
Nakagawa, Keiichi
author_facet Ishijima, Ayumu
Okabe, Shinga
Sakuma, Ichiro
Nakagawa, Keiichi
author_sort Ishijima, Ayumu
collection PubMed
description Frequency- and time-domain Brillouin scattering spectroscopy are powerful tools to read out the mechanical properties of complex systems in material and life sciences. Indeed, coherent acoustic phonons in the time-domain method offer superior depth resolution and a stronger signal than incoherent acoustic phonons in the frequency-domain method. However, it requires scanning of delay time between laser pulses for pumping and probing coherent acoustic phonons. Here, we present Brillouin scattering spectroscopy that spans the time and frequency domains to allow the multichannel detection of Brillouin scattering light from coherent acoustic phonons. Our technique traces the time-evolve Brillouin oscillations at the instantaneous frequency of a chromatic-dispersed laser pulse. The spectroscopic heterodyning of Brillouin scattering light in the frequency domain allows a single-frame readout of gigahertz-frequency oscillations with a spectrometer. As a proof of concept, we imaged heterogeneous thin films and biological cells over a wide bandwidth with nanometer depth resolution.
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spelling pubmed-98066822023-01-03 Dispersive coherent Brillouin scattering spectroscopy Ishijima, Ayumu Okabe, Shinga Sakuma, Ichiro Nakagawa, Keiichi Photoacoustics Research Article Frequency- and time-domain Brillouin scattering spectroscopy are powerful tools to read out the mechanical properties of complex systems in material and life sciences. Indeed, coherent acoustic phonons in the time-domain method offer superior depth resolution and a stronger signal than incoherent acoustic phonons in the frequency-domain method. However, it requires scanning of delay time between laser pulses for pumping and probing coherent acoustic phonons. Here, we present Brillouin scattering spectroscopy that spans the time and frequency domains to allow the multichannel detection of Brillouin scattering light from coherent acoustic phonons. Our technique traces the time-evolve Brillouin oscillations at the instantaneous frequency of a chromatic-dispersed laser pulse. The spectroscopic heterodyning of Brillouin scattering light in the frequency domain allows a single-frame readout of gigahertz-frequency oscillations with a spectrometer. As a proof of concept, we imaged heterogeneous thin films and biological cells over a wide bandwidth with nanometer depth resolution. Elsevier 2022-12-30 /pmc/articles/PMC9806682/ /pubmed/36601363 http://dx.doi.org/10.1016/j.pacs.2022.100447 Text en © 2022 Published by Elsevier GmbH. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Research Article
Ishijima, Ayumu
Okabe, Shinga
Sakuma, Ichiro
Nakagawa, Keiichi
Dispersive coherent Brillouin scattering spectroscopy
title Dispersive coherent Brillouin scattering spectroscopy
title_full Dispersive coherent Brillouin scattering spectroscopy
title_fullStr Dispersive coherent Brillouin scattering spectroscopy
title_full_unstemmed Dispersive coherent Brillouin scattering spectroscopy
title_short Dispersive coherent Brillouin scattering spectroscopy
title_sort dispersive coherent brillouin scattering spectroscopy
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9806682/
https://www.ncbi.nlm.nih.gov/pubmed/36601363
http://dx.doi.org/10.1016/j.pacs.2022.100447
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