Cited by 95Ultrasonics and Acoustic Wave PropagationThermography and Photoacoustic TechniquesMetal and Thin Film Mechanics

Characterization of nanostructured metal films by picosecond acoustics and interferometry

O’Hara, K. E., Hu, Xiaoyuan, Cahill, David G.·2001·Journal of Applied Physics

Abstract

Picosecond interferometry is used to study the acoustics waves created by heating Pt films with a subpicosecond laser pulse. Both the period of the initial oscillations in the metal film and the amplitude of the sound wave in the substrate are measured quantitatively. The platinum films are roughened by irradiation with energetic ions. The amplitude of the sound wave is doubled at those irradiation levels where the platinum coverage has been reduced by about one-half. A theory for the amplitude of the launched acoustic wave predicts that the acoustic amplitude is proportional to the mean square film thickness. Thus changes in the morphology of a partially perforated metal film can be observed using a simple, nondestructive optical technique.

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Crossref · 10.1063/1.1406543

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25 of 25 references verified0 citation errors · 0 not checkable

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  • The Brillouin scattering arises from the interaction between the reflected probe beam and the acoustic waves inside the black phosphorus sample caused by the birefringence originated from the in-plane anisotropy in black phosphorus.

    “The Brillouin scattering arises from the interaction between the reflected probe beam and the acoustic waves inside the black phosphorus sample caused by the birefringence originated from the inplane anisotropy in black phosphorus. 152, 153”

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Authors
O’Hara, K. E., Hu, X., & Cahill, D. G.
Affiliations
University of Illinois Urbana-Champaign (US)
Venue
Journal of Applied Physics
Published
2001-11-01
Volume
90
Issue
9
Pages
4852-4858
ISSN
  • 0021-8979 (ISSN-L)
  • 1089-7550
OpenAlex
W2073818231
Cited by
95
References
25
Citations by year
2026: 3 · 2025: 1 · 2024: 7 · 2023: 3 · 2022: 6 · 2021: 12 · 2020: 6 · 2019: 5 · 2018: 5 · 2017: 6 · 2016: 4 · 2015: 3 · 2014: 2 · 2013: 2 · 2012: 1
FWCI
5.67
Type
journal article
Language
en
Open access
closed
Locations
Journal of Applied Physics (publishedVersion)
Topics
  • Physical Sciences › Engineering › Mechanics of Materials › Ultrasonics and Acoustic Wave Propagation
  • Physical Sciences › Engineering › Mechanics of Materials › Thermography and Photoacoustic Techniques
  • Physical Sciences › Engineering › Mechanics of Materials › Metal and Thin Film Mechanics
Keywords
picosecond acoustics, platinum films, laser heating, film perforation, film thickness, non-destructive characterization, surface morphology

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