Talk 6.1: 1:30PM–2:45PM
| Session Name: | Photonic Systems and Quantum Information |
| Session Time: | 1:30PM–2:45PM |
| Author Name: | Hossein Alizadeh |
| Author Email: | alizadeh@ecf.utoronto.ca |
| Talk Title: | Silicon nanocrystal sensitized erbium-doped silicon rich silicon oxide prepared by evaporation and thermal annealing in air |
| Slides: | 6-1.ppt |
| Abstract: | Room temperature photoluminescence (PL) at 1.54 μm from erbium-doped silicon rich silicon oxide (ErSRSO) films, fabricated by evaporation followed by thermal-annealing is reported. PL measurements show maximum intensity in samples annealed at 1000°C for four hours. X-ray diffraction (XRD) structural analyses show that annealing caused the formation of active Er3+ (Er2O3) centers. XRD and PL results show that increasing Er2O3 concentration does not necessarily lead to an increase in photoluminescence. Decomposition of the SiOx yields well established Si nanocrystellites in a silicon oxide matrix as shown by high resolution transmission electron microscopy (HRTEM). Compositional analysis using Time-of-Flight Secondary Ion Mass Spectroscopy (TOF-SIMS) depth-profiling shows a strong correlation between the presence of contiguous Si rich regions and Er2O3 centers on the one hand and the observed PL on the other. The combination of PL, XRD, TOF-SIMS, and HRTEM results indicate the presence of silicon nanocrystals and its sensitization of erbium excitation. |
| Research Group: | Photonics |
| Degree Program: | Ph.D. |
| Author Bio: | Name: Hossein alizadeh Ph.D. Candidate Currently working on "Light Amplification in Nanocrystalline Silicon Sensitized Erbium-doped Silica" |