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Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics

Ultrafast pump-probe measurements are used to characterize various samples, such as biological cells, bulk, and thin-film structures. However, typical implementations of the pump-probe apparatus are either slow or complex and costly hindering wide deployment. Here we combine a single-cavity dual-com...

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Autores principales: Pupeikis, J., Hu, W., Willenberg, B., Mehendale, M., Antonelli, G.A., Phillips, C.R., Keller, U.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9772547/
https://www.ncbi.nlm.nih.gov/pubmed/36570472
http://dx.doi.org/10.1016/j.pacs.2022.100439
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author Pupeikis, J.
Hu, W.
Willenberg, B.
Mehendale, M.
Antonelli, G.A.
Phillips, C.R.
Keller, U.
author_facet Pupeikis, J.
Hu, W.
Willenberg, B.
Mehendale, M.
Antonelli, G.A.
Phillips, C.R.
Keller, U.
author_sort Pupeikis, J.
collection PubMed
description Ultrafast pump-probe measurements are used to characterize various samples, such as biological cells, bulk, and thin-film structures. However, typical implementations of the pump-probe apparatus are either slow or complex and costly hindering wide deployment. Here we combine a single-cavity dual-comb laser with a simple experimental setup to obtain pump-probe measurements with ultra-high sensitivity, fast acquisition, and high timing precision over long optical delay scan ranges of 12.5 ns that would correspond to a mechanical delay of about 3.75 m. We employ digital signal balancing to obtain shot-noise-limited detection compatible with pump-probe microscopy deployment. Here we demonstrate ultrafast photoacoustics for thin-film sample characterization. We measured a tungsten layer thickness of (700 ± 4) Å with shot-noise-limited detection. Such single-cavity dual-comb lasers can be used for any pump-probe measurements and are especially well-suited for ultrafast photoacoustic studies such as involving ultrasonic echoes, Brillouin oscillations, surface acoustic waves and thermal dynamics.
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spelling pubmed-97725472022-12-23 Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics Pupeikis, J. Hu, W. Willenberg, B. Mehendale, M. Antonelli, G.A. Phillips, C.R. Keller, U. Photoacoustics Research Article Ultrafast pump-probe measurements are used to characterize various samples, such as biological cells, bulk, and thin-film structures. However, typical implementations of the pump-probe apparatus are either slow or complex and costly hindering wide deployment. Here we combine a single-cavity dual-comb laser with a simple experimental setup to obtain pump-probe measurements with ultra-high sensitivity, fast acquisition, and high timing precision over long optical delay scan ranges of 12.5 ns that would correspond to a mechanical delay of about 3.75 m. We employ digital signal balancing to obtain shot-noise-limited detection compatible with pump-probe microscopy deployment. Here we demonstrate ultrafast photoacoustics for thin-film sample characterization. We measured a tungsten layer thickness of (700 ± 4) Å with shot-noise-limited detection. Such single-cavity dual-comb lasers can be used for any pump-probe measurements and are especially well-suited for ultrafast photoacoustic studies such as involving ultrasonic echoes, Brillouin oscillations, surface acoustic waves and thermal dynamics. Elsevier 2022-12-13 /pmc/articles/PMC9772547/ /pubmed/36570472 http://dx.doi.org/10.1016/j.pacs.2022.100439 Text en © 2022 The Authors https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Research Article
Pupeikis, J.
Hu, W.
Willenberg, B.
Mehendale, M.
Antonelli, G.A.
Phillips, C.R.
Keller, U.
Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics
title Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics
title_full Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics
title_fullStr Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics
title_full_unstemmed Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics
title_short Efficient pump-probe sampling with a single-cavity dual-comb laser: Application in ultrafast photoacoustics
title_sort efficient pump-probe sampling with a single-cavity dual-comb laser: application in ultrafast photoacoustics
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9772547/
https://www.ncbi.nlm.nih.gov/pubmed/36570472
http://dx.doi.org/10.1016/j.pacs.2022.100439
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