Picosecond ultrasonics

被引：85
|
作者：
Maris, H
机构：
[1] Brown Univ, Providence, RI
来源：
SCIENTIFIC AMERICAN | 1998年 / 278卷 / 01期
关键词：
D O I：
10.1038/scientificamerican0198-86
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：
An instantaneous flash of laser light can set up ultrasonic vibrations lasting just trillionths of a second. At present, industrial engineers are learning how to put all these but imperceptible sound waves to work in sonar systems that can probe thin semiconductor films or other materials for flaws.
引用
收藏
页码：86 / 89
页数：4
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