By means of an ultrafast optical technique, picosecond acoustic strain pulses in a transparent medium are tomographically visualized at GHz frequencies. The strain distribution in BK7 glass is reconstructed from time-domain reflectivity changes of 415-nm probe light as a function of the optical incidence angle with 1 ps temporal and 120 nm spatial resolutions, enabled by automated angle scanning. The latter resolution is achieved owing to the commensurate acoustic wavelength. Applications include imaging strain, carrier and temperature distributions on ultrashort timescales.

Tomographic reconstruction of picosecond acoustic strain pulses using automated angle-scan probing with visible light / Tomoda, Motonobu; Matsuo, Hiroyuki; Matsuda, Osamu; Li Voti, Roberto; Wright, Oliver B. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - 34:(2023), pp. 1-9. [10.1016/j.pacs.2023.100567]

Tomographic reconstruction of picosecond acoustic strain pulses using automated angle-scan probing with visible light

Li Voti, Roberto
Penultimo
Writing – Review & Editing
;
2023

Abstract

By means of an ultrafast optical technique, picosecond acoustic strain pulses in a transparent medium are tomographically visualized at GHz frequencies. The strain distribution in BK7 glass is reconstructed from time-domain reflectivity changes of 415-nm probe light as a function of the optical incidence angle with 1 ps temporal and 120 nm spatial resolutions, enabled by automated angle scanning. The latter resolution is achieved owing to the commensurate acoustic wavelength. Applications include imaging strain, carrier and temperature distributions on ultrashort timescales.
2023
Acoustic tomography; Angle scan; Brillouin scattering; Inverse problem; Picosecond ultrasonics; Singular value decomposition
01 Pubblicazione su rivista::01a Articolo in rivista
Tomographic reconstruction of picosecond acoustic strain pulses using automated angle-scan probing with visible light / Tomoda, Motonobu; Matsuo, Hiroyuki; Matsuda, Osamu; Li Voti, Roberto; Wright, Oliver B. - In: PHOTOACOUSTICS. - ISSN 2213-5979. - 34:(2023), pp. 1-9. [10.1016/j.pacs.2023.100567]
File allegati a questo prodotto
File Dimensione Formato  
Tomoda_Tomographic_2023.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 2.35 MB
Formato Adobe PDF
2.35 MB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1696879
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact