High Pressure Studies of Cr and Mn Near-Infrared Solid State Cover Materials

本研究项目研究离子晶体中过渡金属掺杂剂的能级和振动相互作用，重点研究最近发现的Cr4+活化固体激光材料的高压光致发光研究。该研究的主题是通过高压发光、激发和寿命测量来解决围绕Cr4+材料特性的不确定性，从而将发光特性与晶体场强联系起来，并了解州际混合对发光特性的影响。等电子Mn5+的相关研究，目前已知只在少数氧化物中作为强场离子发生，也将在该项目中考虑。该项目是跨学科的，结合了基础材料化学和材料科学的合成和加工研究，采用先进的表征工具和分析方法，以解决技术相关性强、潜在回报高的主题领域的前沿问题。该研究将为高带宽通信技术中关键的先进光子器件的几个方面提供基础材料科学知识。此外，从本研究项目中获得的知识和理解有望通过为设计和生产改进的材料和材料组合提供基本的理解和基础，从而以一般方式为改进先进设备和通信系统的性能做出贡献。该计划的一个重要特点是通过培养学生在一个基础和技术上重要的领域的研究和教育的整合。＊＊＊

9629990 Bray This research project investigates the energy levels and vibronic interactions of transition-metal dopants in ionic crystals focusing on high-pressure photoluminescence studies of recently discovered Cr4+ -activated solid state laser materials. The theme of the proposed research is to address uncertainties surrounding the properties of Cr4+ materials through high pressure luminescence, excitation, and lifetime measurements to relate luminescence properties to crystal field strength, and to understand the effect of interstate mixing on luminescence properties. Related studies of isoelectronic Mn5+ , currently known to occur only as a strong field ion in a few oxides will also be considered in the project. %%% The project is interdisciplinary combining fundamental materials chemistry and materials science synthesis and processing studies with advanced characterization tools and analysis methods to address forefront issues in a topical area of strong technological relevance and high potential payoff. The research will contribute basic materials science knowledge at a fundamental level to several aspects of advanced photonic devices critical to high bandwidth communications technology. Additionally, the knowledge and understanding gained from this research project is expected to contribute in a general way to improving the performance of advanced devices and communications systems by providing a fundamental understanding and a basis for designing and producing improved materials, and materials combinations. An important feature of the program is the integration of research and education through the training of students in a fundamentally and technologically significant area. ***