COLLEGE OF ARTS & SCIENCES
Cadmium Magnesium Telluride (CdMgTe) has been found to have rare properties useful to the study of optics and semi-conductors. These properties include a high degree of crystallinity due to a similar lattice structure between the atoms of CdTe and MgTe. CdMgTe also possess exceptional homogeneity because the Mg segregation coefficient in CdTe is approximately equal to 1. Consequently, CdMgTe may be a usable material for room temperature gamma-ray detectors, as well as high-powered laser applications. In order to further understand the intrinsic properties of CdMgTe, the refractive indices as a function of wavelength were measured, encompassing wavelengths between .7 and 5.2 microns. The measurements were conducted at constant room temperature and the data was fit to a four parameter Sellmeier equation.
Effects of annealing InAs/InAsSb type-II infrared superlattices
STUDENTS Sara T Hierath, Arthur H Siwecki ADVISORS Said Elhamri LOCATION, TIME RecPlex, 11:00AM-12:30PM College of Arts and Sciences: Physics, Poster- Independent Research InAs/InAsSb type-II superlattices (SLs) are a current material of interest for mid- and long-wavelength infrared detectors. Recent studies on InAs/(In)GaSb SLs involving annealing treatments have shown some improvement in the material properties, which may indicate increased dopant activation and decreased dislocation density. This study investigates the effect of rapid thermal annealing (RTA) on the electrical, optical, and structural properties of a mid-wavelength infrared InAs/InAsSb SL design doped with Be at a concentration of 5x1016 cm-3. Samples cut from a single InAs/InAsSb SL wafer were annealed utilizing RTA at two temperatures (440°C and 460°C) and two different time intervals (30 seconds and 1 minute). Hall Effect, photoluminescence, and high resolution x-ray diffraction measurements were taken before and after annealing to determine the impact on SL properties. Results of these measurements will be presented and discussed.
Exploring Data-Driven Electricity Feedback on Energy Conservation Behavior in the University of Dayton Student Neighborhood
STUDENTS Daniel R Esposito ADVISORS Robert J Brecha LOCATION, TIME RecPlex, 11:00AM-12:30PM College of Arts and Sciences: Physics, Poster- Honors Thesis In general, homeowners do not have a concrete idea of how much energy their houses are using at any given moment. This energy “invisibility” is thought to be a barrier toward people adopting more sustainable behaviors. This study involves installing energy monitors in houses in the University of Dayton student neighborhood to analyze two important questions: whether the monitors teach students about the relationship between their activities and energy consumption, and whether the monitors influence students to adjust their household behaviors. Ideally, conclusions will be drawn from quantitative data collected from the monitors and the university’s energy provider as well as from qualitative data acquired through the distribution of questionnaires. The results could have direct policy implications for the university, such as informing whether it would be worth investing in energy monitors for all student neighborhood properties.
The Glass Walls Project: Sharing Science and Engineering in 3D
STUDENTS William J Sember ADVISORS Peter E Powers LOCATION, TIME RecPlex, 11:00AM-12:30PM College of Arts and Sciences: Physics, Poster- Independent Research The Glass Walls Project is the brainchild of Dr. Peter Powers. It is a computer application for visualizing scientific and engineering laboratories, logging experiments, and networking the process. This presentation is a demo program focused on the 3-dimensional visualization and exploration of laboratories.
The Role of Nitrogen Vacancy in Optical Transitions in GaN STUDENTS Malik A Malone ADVISORS Andrew O Evwaraye LOCATION, TIME RecPlex, 11:00AM-12:30PM College of Arts and Sciences: Physics, Poster- Independent Research
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