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Suppression of Brillouin oscillation in transparent free-standing diamond thin films in picosecond ultrasound.
- Source :
-
Applied Physics Letters . 3/14/2022, Vol. 120 Issue 11, p1-5. 5p. - Publication Year :
- 2022
-
Abstract
- Brillouin oscillation appears in picosecond ultrasonics for a transparent specimen because of backward light scattering by moving strain pulse. Its amplitude is comparable with those of other responses, such as pulse-echo signals and through-thickness resonance, obscuring these non-Brillouin-oscillation responses. We here find that Brillouin oscillation can be suppressed in a transparent free-standing film by coating both sides with a metallic thin film of appropriate thickness and that this peculiar behavior is caused by strain pulses generated on both sides with a slight phase difference. This phenomenon allowed us to fabricate a Brillouin-oscillation-free diamond free-standing film, which showed a high capability for sensor applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 120
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 155816765
- Full Text :
- https://doi.org/10.1063/5.0087648