物质吸收光而被激发到激发态,接着通过无辐射过程把部分或全部激发能转变为热能。近年来,以这一去激发机构为物理基础的几种高灵敏度的光热光谱技术发展了起来。光热光谱技术,一般不受样品形态的限制;无论是气体、液体,还是透明或不透明的固体,粉末及表面物质等都可应用。北京化工学院李长江等研究了光热光谱 The substance absorbs light and is excited into an excited state, which is then converted into thermal energy by a radiationless process. In recent years, several high-sensitivity photothermal spectroscopy technologies have been developed based on the physical basis of this excitation mechanism. Photothermal spectroscopy is generally not limited by the shape of the sample; either gas, liquid, transparent or opaque solids, powders and surface materials can be used. Beijing Institute of Chemical Li Changjiang studied light and heat spectroscopy