Optical TCAD on the Net: A tight-binding study of inter-band light transitions in self-assembled InAs/GaAs quantum dot photodetectors

A new capability of our well-known NEMO 3-D simulator (Ref. Klimeck et al., 2007 [10]) is introduced by carefully investigating the utility of III–V semiconductor quantum dots as infrared photodetectors at a wavelength of 1.2–1.5 μm. We not only present a detailed description of the simulation methodology coupled to the atomistic sp3d5s∗ tight-binding band model, but also validate the suggested methodology with a focus on a proof of principle on small GaAs quantum dots (QDs). Then, we move the simulation scope to optical properties of realistically sized dome-shaped InAs/GaAs QDs that are grown by self- assembly and typically contain a few million atoms. Performing numerical experiments with a variation in QD size, we not only show that the strength of ground state inter- band light transitions can be optimized via QD size-engineering, but also find that the hole ground state wavefunction serves as a control factor of transition strengths. Finally, we briefly introduce the web-based cyber infrastructure that is developed as a government- funded project to support online education and research via TCAD simulations. This work not only serves as a useful guideline to experimentalists for potential device designs and other modelers for the self-development of optical TCAD, but also provides a good chance to learn about the science gateway project ongoing in the Republic of Korea

Investigating a Data Management Environment for Structural Bioinformatics Research Data

This study investigates the Structural Biology Central Facility at a large academic research institution and examines the Central Facility's most pressing data management needs. The University's Health Affairs Library has undertaken an initiative to pursue data management support for researchers in the biomedical sciences and the central facility has been identified as one of the library's first partners in assessing and proposing data management services the library could provide. Five groups of campus stakeholders that mutually contribute and participate in assisting the structural biology central facility were identified and interviewed to identify contributions to the central facility's data management practices. From these interviews, seven major obstacles were identified around which the Health Affairs Library could develop novel strategies for extending data management services into biomedical research environments.Master of Science in Information Scienc