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