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Research Abstracts Online
January 2010 - March 2011

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University of Minnesota Twin Cities
College of Science and Engineering
Department of Electrical and Computer Engineering

PI: Steven J. Koester

Simulation of Strain in Suspended III-V Nanowires

This project involves the simulation of strain in suspended III-V nanowire structures.  Nanowires offer tremendous opportunity for new electronic and photonic device applications, as well as for improving the performance of existing devices. A particular feature inherent to nanowires that could be beneficial for devices is the ability to manipulate strain in ways not possible in bulk structures. This is due to the large surface-to-volume ratio, which provides additional degrees of freedom for applying/relieving stress in these structures. However, the precise strain in a particular nanowire structure is determined by numerous external forces acting on the wire simultaneously, and therefore device design requires a way to accurately predict this strain. The goal of this project is to utilize COMSOL Multiphysics to simulate the strain in the nanowire structures that utilize a variety of III-V semiconductor materials, have different dimensions, and are subjected to various external stressors. The results of these simulations will be used to guide experiments that could ultimately result in field-effect transistors with improved performance and may enable a host of devices with new functionality.

Group Member

Chaitanya Kshirsagar, Graduate Student