Suppression of Brillouin oscillation in transparent free-standing diamond thin films in picosecond ultrasound

Autor:	H. K. Weng, A. Nagakubo, H. Watanabe, H. Ogi
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Physics and Astronomy (miscellaneous) FOS: Physical sciences Applied Physics (physics.app-ph) Physics - Applied Physics
Popis:	H. K. Weng, A. Nagakubo, H. Watanabe, and H. Ogi, "Suppression of Brillouin oscillation in transparent free-standing diamond thin films in picosecond ultrasound", Appl. Phys. Lett. 120, 112203 (2022) https://doi.org/10.1063/5.0087648. 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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e0f89f262a025db4c7e7ad115b04ab61 http://arxiv.org/abs/2203.05264 Zobrazit plný text záznamu