Acquisition of a Dispersive Raman Spectrometer System for Basic Investigations on Network Glasses

9424556布尔昌德，普尼特这一色散拉曼光谱仪系统奖将用于网络玻璃的基础研究。约束理论预测，当每个原子的约束数恰好等于每个原子的自由度时，网络的玻璃形成趋势将在刚性(或刚性渗流)阈值附近进行优化。建议使用互补探针：拉曼散射和Lamb-Mossbauer因子，详细研究硫系玻璃中这一刚性阈值的物理性质。这些实验可能会导致对这些玻璃的中程有序的理解，而这一点目前还不清楚。这台仪器将由从事具有重要技术意义的玻璃和半导体材料的基础材料研究的研究人员以及从事光子材料和毫米波技术领域研究的工程师共享。

9424556 Boolchand, Punit This award for a dispersive Raman spectrometer system will be used for basic investigations of network glasses. Constraint theory predicts the glass forming tendency of a network to be optimized near the stiffness (or rigidity percolation) threshold, when a number of constraints per atom exactly equals the degrees of freedom per atom. It is proposed to examine in detail, the physical nature of this stiffness threshold in chalcogenide glasses using complementary probes: Raman scattering and Lamb-Mossbauer factors. These experiments may lead to an understanding of the medium range order of these glasses, which is presently not understood. This instrument will be shared by investigators conducting fundamental materials research on technologically important glasses and semiconductor materials, and by engineers conducting research in the area of photonic materials and millimeter wave technology.