RUI: Depth-Resolved Photoluminescence Imaging for Optical Characterization of Semiconductor Heterostructures

9803189 Behringer这个项目旨在开发一种在液态氦温度下对半导体进行深度分辨和横向空间分辨光致发光(PL)的装置，并让本科生参与实验研究。这是通过构造氦浴低温恒温器的插件来实现的，该插件消除了浸没光束路径和光学的困难，同时通过使用简单的机械和耐热的平移机构提供了大约1微米的横向分辨率。采用不同的激发波长可以实现深度分辨。光谱色散后，光致发光信号将被液氮冷却的锗光电二极管检测到。该系统的建成和使用为学生提供了在机械、热学、光学设计和施工、计算机接口、实验设计以及基础研究数据的收集和解释方面获得经验的机会。该项目主要针对具有高度技术相关性的材料科学主题领域的本科生进行基础研究问题的介绍和培训。这项研究将在电子/光子材料性质的基本方面为本科生提供基本的材料科学知识和初级教育利益。该计划的一个重要特点是通过在一个具有根本意义和技术意义的领域对本科生进行培训，将研究和教育相结合。***

9803189 Behringer This RUI project aims to develop an apparatus to perform depthresolved and laterally spatially-resolved photoluminescence(PL) on semiconductors at liquid He temperature, and to involve undergraduates in experimental research. This is to be achieved by constructing an insert for a helium bath cryostat that eliminates difficulties of immersed beam paths and optics while providing a lateral resolution of approximately one micrometer by using mechanically simple and thermally robust translation mechanisms. The depth resolution will be achieved by using different excitation wavelengths. After spectral dispersion, the photoluminescence signal will be detected with a liquid nitrogen cooled germanium photodiode. The completion and utilization of this system provides opportunities for students to gain experience in mechanical, thermal, and optical design and construction, computer interfacing, experimental design, and collection and interpretation of basic research data. %%% The project primarily addresses the introduction and training of undergraduate students in basic research issues in a topical area of materials science having high technological relevance. The research will contribute basic materials science knowledge and primary educational benefits to undergraduates in fundamental aspects of electronic/photonic materials properties. An important feature of the program is the integration of research and education through the training of undergraduate students in a fundamentally and technologically significant area. ***