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Design and fabrication of a CMOS-compatible, electrically pumped silicon laser device
A truly silicon-based electrically pumped laser, especially one compatible with current semiconductor technologies, has yet to be demonstrated.
This project is centered around fabricating low-loss waveguide structures that allow for both incorporation of Si-based gain materials and efficient carrier injection.
This ongoing research is funded by the Air Force Office of Scientific Research. Design of a genetic algorithm to search for the structure of linear defects on crystal surfaces
An evolutionary approach was employed to find energetically favorable candidates starting from a collection of random structures.
The algorithm was successfully applied to the problem of determining the atomic structure of surface steps on Si(114). Modeling the effect of strain and hydrogen environment on the H:Si(105) and H:Ge(105) surfaces
The relative stabilities of different surface reconstructions were determined for hydrogen passivated Si(105) and Ge(105).
The (105) facets of the atomic clusters observed with the Ge/Si(001) epitaxial system were found to become thermodynamically unstable in certain hydrogen environments. Modeling point defect interaction on the reconstructed Si(001)-2x1 surface
The energies associated with the interaction of identical and dissimilar point defects were calculated in order to study the organization of such defects on reconstructed Si(001).
Defects studied include ad-dimers, dimer vacancies, and interstitial carbon atoms near the surface. |
