宽禁带、绝缘体材料中的激子动力学研究(同步辐射应用)

INVESTIGATIONS ON EXCITON DYNAMICS IN SOLIDS WITH WIDE BAND GAP INSULATORS (SYNCHROTRON RADIATION APPLICATIONS)

本文综述了近年来使用同步辐射研究稀有气固体、碱卤化物、碱土卤化物以及含稀土的离子晶体等宽禁带、绝缘体材料在激子动力学特性方面所取得的主要进展。包括激子的基本特性,激子与晶格的相互作用,特别是激子的自陷与激子激励的解吸附,激子与稀土中心间的能量传递,高激子态的弛予以及团簇中的激子特性等。最后简介典型的实验系统。

The main developments in recent years on investigating exciton dynamics in solids with wide band gap insulators, including rare gas solids, alkali halides, alkali earth halides and the ionis crystals doped with rare earth. Using synchrotron radiation are summarized. The developments include fundamental properties of the exciton, interaction between excitons and lattice especially self trapping of the exciton and the desorption due to exciton-phonon interaction, energy transfer between excitons and rare earth centers, the relaxation of high excitonic states as well as behaviour of the exciton in the clusters. Finally a typical experiment system is introduced.