Picosecond ultrasonics with miniaturized semiconductor lasers

Kobecki, M. et al. (2020) Picosecond ultrasonics with miniaturized semiconductor lasers. Ultrasonics, 106, 106150. (doi: 10.1016/j.ultras.2020.106150)

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There is a great desire to extend ultrasonic techniques to the imaging and characterization of nanoobjects. This can be achieved by picosecond ultrasonics, where by using ultrafast lasers it is possible to generate and detect acoustic waves with frequencies up to terahertz and wavelengths down to nanometers. In our work we present a picosecond ultrasonics setup based on miniaturized mode-locked semiconductor lasers, whose performance allows us to obtain the necessary power, pulse duration, and repetition rate. Using such a laser, we measure the ultrasonic echo signal with picosecond resolution in a 112 nm thick Al film deposited on a semiconductor substrate. We show that the obtained signal is as good as the signal obtained with a standard bulky mode-locked Ti-Sa laser. The experiments pave the way for designing integrated portable picosecond ultrasonic setups on the basis of miniaturized semiconductor lasers.

Item Type:Articles
Additional Information:The work was supported by the Bundesministerium für Bildung und Forschung through the project “Nano-Akusto-Mechanik mit integriertem Laser (NAMIL)” (FKZ 13N14071) and the Deutsche Forschungsgemeinschaft in the frame of TRR 142 (project A6).
Keywords:Picosecond ultrasonics, semiconductor lasters, coherent phonons.
Glasgow Author(s) Enlighten ID:Tandoi, Mr Giuseppe and Di Gaetano, Mr Eugenio and Sorel, Professor Marc
Creator Roles:
Tandoi, G.Methodology
Di Gaetano, E.Methodology, Writing – review and editing
Sorel, M.Supervision, Writing – review and editing
Authors: Kobecki, M., Tandoi, G., Di Gaetano, E., Sorel, M., Scherbakov, A. V., Czerniuk, T., Schneider, C., Kamp, M., Höfling, S., Akimov, A. V., and Bayer, M.
Subjects:Q Science > Q Science (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Research Group:Optoelectronics
Journal Name:Ultrasonics
ISSN (Online):1874-9968
Published Online:03 April 2020
Copyright Holders:Copyright © 2020 Elsevier B.V.
First Published:First published in Ultrasonics 106: 106150
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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