Time-resolved imaging of GHz surface acoustic waves using two-dimensional imaging devices

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K13713
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: General applied physics
• Research Institution: Hokkaido University
• Principal Investigator: Matsuda Osamu 北海道大学, 工学研究院, 准教授 (30239024)
• Co-Investigator(Kenkyū-buntansha): O・B Wright 北海道大学, 工学研究院, 教授 (90281790) ; 友田 基信 北海道大学, 工学研究院, 助教 (30344485)
• Research Collaborator: PEZERIL Thomas ; FUJITA Kentaro
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 表面音響波 / 時間分解イメージング / ポンププローブ法 / ２次元撮像素子 / GHz音響波 / フルフィールド

Outline of Final Research Achievements

To achieve the fast time-resolved two-dimensional imaging of GHz surface acoustic waves using two dimensional imaging device, we performed the following studies. 1) The interferometer optics which transfers images of surface displacement caused by the acoustic vibration to the imaging plane of the camera as the intensity images has been prototyped, and its functionality has been confirmed. 2) Self-adopted interferometer setup using photo-refractive crystal has been considered. 3) The software for the fast transfer and analysis of images for high-speed CCD camera has been developed. As the secondary studies, 4) the light scattering theory for the quantitative handling of the modulation of the light reflection by the acoustic waves has been developed, and 5) the optical generation of detection of acoustic waves using nano-scale metal grating structure has been studied.

Free Research Field

フォノン物性、光物性、超高速分光