Spectroscopy of Ordered Materials

9424216 Yen该实验项目研究发光材料的光学性质，重点是光激发态的动力学性质;这些性质来自活性中心之间的相互作用以及固体的基本激发。新的光学活性材料将通过激光加热基座生长方法进行合成，设计和表征，其中非线性光学过程可以通过样品中的成分变化进行精确控制。 此外，还讨论了有序材料中窄带非平衡声子和磁振子激发态的动力学过程 将 追究 这些研究将提供更好的见解 固体中的弛豫和输运性质。 对发光或发光材料的光谱特性的研究正在进行中。正在研究的材料被用于各种各样的通信和显示技术。该项目涉及的方法，使新材料具有更好的性能，可以合成和改善其光学特性的结果。 为了改善这些材料，必须对固体基质中负责发光的原子中心与其周围环境之间的相互作用有基本的了解;这些过程通常会导致光激发原子态的耗散和弛豫，需要加以抑制以提高材料效率。 这里提出的光学研究预计将提供这些相互作用的基本见解。 ***

9424216 Yen This experimental project studies of the optical properties of luminescent materials with emphasis on the dynamical properties of the optically excited states; these properties arise from interactions between the active centers and with the elementary excitations of the solid. New optically active materials will be synthesized, engineered, and characterized through the Laser Heated Pedestal Growth method in which non-linear optical processes can be accurately controlled through compositional changes in the samples. In addition, the dynamical processes of excited states induced by narrow band non- equilibrium phonons and magnons in ordered materials will be investigated. These studies will provide better insights into relaxation and transport properties in solids. %%% Studies of the optical spectroscopic properties of materials which are luminescent or emit light are being carried out. The materials being studied are employed in a wide variety of communications and display technologies. The project involves methods whereby new materials with better properties can be synthesized and improved as a result of their optical characterization. In order to improve these materials a fundamental understanding of the interactions between the atomic centers responsible for emitting light and their surroundings in the solid host must be arrived at; these processes often lead to dissipation and relaxation of the optically excited atomic state and need to be suppressed to improve material efficiencies. The optical studies proposed here are expected to provide basic insights on these interactions. ***