Picosecond ultrasonics

被引：86
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.
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页码：86 / 89
页数：4
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