A scanning acoustic microscope based on picosecond ultrasonics

被引：10

作者：

Che, S. ^{[1
]}

Guduru, P. R. ^{[2
]}

Nurmikko, A. V. ^{[1
,2
]}

Maris, H. J. ^{[1
,2
]}

机构：

[1] Brown Univ, Dept Phys, Providence, RI 02912 USA

[2] Brown Univ, Sch Engn, Providence, RI 02912 USA

来源：

ULTRASONICS | 2015年 / 56卷

关键词：

Acoustic microscope; Acoustic lens; ABSORPTION;

D O I：

10.1016/j.ultras.2014.02.010

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We report on the development of a new type of scanning acoustic microscope. We use a femtosecond light pulse to generate a short sound pulse, and then focus this sound onto the sample by means of a specially designed and microfabricated acoustic lens of radius a few microns. The sound travels to the sample through a thin layer of water. The sound reflected from the sample is collected by the lens and then passes through a monolithically integrated optical resonant cavity. The induced change in the properties of this cavity are measured using a time-delayed probe light pulse. We describe some of the challenges involved in the construction and operation of this high-precision metrology apparatus and present some preliminary results. (C) 2014 Elsevier B.V. All rights reserved.

引用

收藏

页码：153 / 159

页数：7

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