利用激光超声声谱技术研究凝聚态物质

Application of Laser-ultrasonic Techniques to Study Condensed Materials

利用脉冲激光在凝聚态物质中激发超声,并利用光干涉仪或压电换能器接收脉冲超声信号,即激光超声声谱技术,已广泛用于研究凝聚态物质的弹性性质和结构检测。近来特别发展了利用激光超声技术定征固体材料的热学特性,同时发展用于研究具有生物活性的物质的光解反应动力学和热力学过程,获得了非常满意的结果。

The elastic properties and structures of condensed materials have been studied by ultrasonic waves excited by apulsed laser and detected by an optical interferometers or a piezoelectric transducer, i.e.,laser-ultrasonic spectroscopic tech-nique. Recently the laser ultrasonic techniques are particularly developed to characterize the thermal property of solid materialsand also to study dynamic and thermodynamic processes of photolysis reactions of organic materials with biological activity, bywhich several satisfactory results are obtained.