Modeling the Charge Injection Process in Acoustic Charge Transport Devices
Acoustic charge transport (ACT) devices are a relatively new development in charge transfer devices (CTDs). CTDs confine and transport charge using time and space varying potential wells. In ACT devices the potential wells are created via the interaction of electrostatic biasing and the potential variation accompanying a surface acoustic wave (SAW). It is important to understand the process of injecting charge into the traveling potential wells in order to properly model ACT operation. To this end a method has been developed using solutions of the two-dimensional Poisson equation to study the charge injection process. The basic concept of acoustic charge transport is introduced. The reduction of Maxwell's equations to the Poisson equation describing the charge and potential distributions in two dimensions is then presented. A model for the charge injection region is developed. The effects of the SAW on the Poisson equation and its boundary conditions are then taken into account. The numerical method of solution is briefly described. Potential and charge distributions are found for several phases of the SAW passing underneath a surface contact and show the relationship between injected packet size and delay in packet injection for various applied biases.
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Liou, Juin J.
Master of Science (M.S.)
College of Engineering
Electrical Engineering and Communication Sciences
Length of Campus-only Access
Masters Thesis (Open Access)
Dissertations, Academic -- Engineering; Engineering -- Dissertations, Academic
Knapp, Scott M., "Modeling the Charge Injection Process in Acoustic Charge Transport Devices" (1989). Retrospective Theses and Dissertations. 4169.