Construction and application of GHz acoustic metamaterials

2015 Fiscal Year Final Research Report

• Project/Area Number: 25246030
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: General applied physics
• Research Institution: Hokkaido University
• Principal Investigator: Wright Oliver 北海道大学, 工学(系)研究科(研究院), 教授 (90281790)
• Co-Investigator(Kenkyū-buntansha): MATSUDA Osamu 北海道大学, 大学院工学研究院, 准教授 (30239024) ; TOMODA Motonobu 北海道大学, 大学院工学研究院, 助教 (30344485)
• Research Collaborator: Otsuka Paul 北海道大学, 大学院工学研究院, 研究員 ; Mezil Sylvain 北海道大学, 大学院工学研究院, 研究院 ; Gusev Vitali Maine University, 教授 ; Lee Sam Hyeon Yonsei University, 教授 ; Kuipers L. Kobus FOM-institute AMOLF, 教授
• Project Period (FY): 2013-10-21 – 2016-03-31
• Keywords: 音響メタマテリアル / ピコ秒超音波 / フォノン / 異常透過 / 負の質量密度 / 負の弾性率 / イメージング / 音響顕微鏡

Outline of Final Research Achievements

We investigate gigahertz acoustic metamaterials, extending them to the nanoscale and thus facilitating the development of new nanoscale acoustic microscopies. The aim is to optically generate coherent phonons with frequencies ~1-100 GHz and wavelengths down to ~100 nm in nano-metamaterials to control bulk and surface acoustic waves on very short temporal (~1 ps) and spatial (~20-50 nm) scales. Applications include solid-state super-lensing, extraordinary transmission, negative refraction, surface acoustic wave cloaking, metamaterial resonators and hybrid opto-mechanical materials. We concentrate on three main topics: 1. Design of GHz acoustic metamaterials, 2. GHz extraordinary transmission, metamaterial resonators, and deep-sub-wavelength focusing, 3. Hybrid GHz opto-mechanical metamaterials. During the course of this work a number of supplementary applications were conceived at lower frequencies.

Free Research Field

フォノン物性、光物性