2022年3月14日
Suppression of Brillouin oscillation in transparent free-standing diamond thin films in picosecond ultrasound
Applied Physics Letters
- ,
- ,
- ,
- 巻
- 120
- 号
- 11
- 開始ページ
- 112203
- 終了ページ
- 112203
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1063/5.0087648
- 出版者・発行元
- AIP Publishing
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.
- ID情報
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- DOI : 10.1063/5.0087648
- ISSN : 0003-6951
- eISSN : 1077-3118