Watching surface waves in phononic crystals

被引：18

作者：

Wright, Oliver B. ^{[1
]}

Matsuda, Osamu ^{[1
]}

机构：

[1] Hokkaido Univ, Fac Engn, Div Appl Phys, Sapporo, Hokkaido 0608628, Japan

来源：

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES | 2015年 / 373卷 / 2049期

基金：

日本学术振兴会;

关键词：

phononic; crystal; acoustic; ultrasonic; imaging; gigahertz; ACOUSTIC-WAVES; LASER ULTRASONICS; ELASTIC-WAVE; REAL-TIME; BAND-GAP; PROPAGATION; VISUALIZATION; PHOTOELASTICITY; INTERFEROMETRY; EVOLUTION;

D O I：

10.1098/rsta.2014.0364

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

In this paper, we review results obtained by ultrafast imaging of gigahertz surface acoustic waves in surface phononic crystals with one- and two-dimensional periodicities. By use of quasi-point-source optical excitation, we show how, from a series of images that form a movie of the travelling waves, the dispersion relation of the acoustic modes, their corresponding mode patterns and the position and widths of phonon stop bands can be obtained by temporal and spatio-temporal Fourier analysis. We further demonstrate how one can follow the temporal evolution of phononic eigenstates in k-space using data from phononic-crystal waveguides as an example. (C) 2015 The Author(s) Published by the Royal Society. All rights reserved.

引用

页数：18

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