金刚石薄膜抗激光破坏研究

介绍了金刚石优异的光学和力学特性,对金刚石薄膜在从紫外到红外波段以及不同脉宽激光参数下的激光损伤行为和损伤阈值进行了评述。分析了不同激光工作参数对金刚石薄膜的激光损伤机理,认为石墨化导致晶格失稳是金刚石薄膜激光损伤的主要原因。金刚石薄膜石墨化有两种方式:垂直表面向体层方向石墨化和平行表面按分层的方式逐层石墨化。

Laser induced damage for diamond films

The outstanding optical and mechanical properties of diamond films are summarized. Laser damage for films irradiated with different wave lengths and pulse width are reviewed and the laser damage mechanism analyzed for different parameters. It is found that graphitization induced instability of the crystal lattice is the main reason for laser induced damage. There are two ways that lead to graphitized damage on the surface of diamond films under long and short laser pulses. For nanosecond or longer laser pulses, graphitization propagates vertically into the bulk of the diamond films. For femtosecond laser pulses, graphitization occurs on the surface of the diamond films layer by layer. Based on the physical properties and preparation technology, practical and promising applications of diamond films are proposed.