Ultrasonics/Surface Acoustic-Wave Control and Energy-Transport/Harvesting Devices using Phononic Structures

2014 Fiscal Year Final Research Report

• Project/Area Number: 25600132
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: General applied physics
• Research Institution: Okayama University
• Principal Investigator: TSURUTA Kenji 岡山大学, 自然科学研究科, 教授 (00304329)
• Co-Investigator(Kenkyū-buntansha): FUJIMORI Kazuhiro 岡山大学, 大学院自然科学研究科, 准教授 (70314705) ; ISHIKAWA Atsushi 岡山大学, 大学院自然科学研究科, 助教 (90585994)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 超音波 / フォノニック結晶 / 表面弾性波 / テラヘルツ波 / 圧電性薄膜 / 分子動力学 / 音響ダイオード

Outline of Final Research Achievements

Periodic structure called “Phononic Crystal”, which enables tailoring of elastic wave propagation, has been designed for new energy-transport/harvesting devices and for new THz wave generation/control.
Specifically, we have performed i) numerical design and proof-of-principle experiments of GRIN lenses consisting of a 2-dimensional phononic structure, ii) molecular-dynamics analysis of THz wave propagation on a piezoelectric thin film and its control by a periodic hole array, and iii) numerical design of an acoustic diode based on a piezoelectric-dielectric periodic structure.

Free Research Field

デバイス物理