Liquid carbon observed with reflection measurements on CVD-diamond under UV pulsed-laser irradiation

被引：1
|
作者：
Tosin, P
Luthy, W
Weber, HP
机构：
[1] Institute of Applied Physics, CH-3012 Bern
来源：
APPLIED SURFACE SCIENCE | 1996年 / 96-8卷
关键词：
D O I：
10.1016/0169-4332(95)00490-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In pulsed laser processing of CVD-diamond layers it is an open question whether there exists an intermediate liquid phase of carbon under the influence of high temperature and pressure or not. Such a liquid phase would show an enhanced mobility of electrons and therefore a metal-like behaviour. This would result in an increased reflectivity. We measured the time-resolved reflectivity of diamond films during pulsed laser irradiation at 193 nm and found clearly increased values for a period of typically 200 ns. By virtue of a comparison with silicon, this increase in reflectance is assigned to a metallic, liquid phase of carbon.
引用
收藏
页码：384 / 386
页数：3
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