- Silicon Photonics
- Space Weathering
- Defects in Semiconductors
- Positron Annihilation Spectroscopy
- Research Opportunities
Prof. Peter Simpson
Physics & Astronomy 210
psimpson [at] uwo [dot]ca
FAX: (519) 661-2033
Positron Annihilation Spectroscopy
The Positron Beam Laboratory uses beams of positrons (the anti-particle of the electron) as a probe to study the structure of solids, especially electronic materials. Positron annihilation has unique sensitivity to vacancies, vacancy clusters and voids in materials.
The drive to develop nanometre-scaled materials and devices requires advanced characterization techniques that can function at these very small dimensions. Positron annihilation is one of very few techniques that can probe atom-sized defects in solids.