Room Temperature Photoluminescence from Erbium in Silica by Evaporation and Thermal Oxidation
Bibliographic record
Abstract
Room temperature photoluminescence (PL) at 1.54 µm from erbium-doped silicon rich silicon oxide (ErSRSO) films, fabricated on fused quartz by thermal evaporation followed by thermal-annealing in air, is reported. PL measurements show maximum intensity in samples annealed at 1000 °C for 4 h. 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. 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, and TOF-SIMS results indicate the presence of silicon clusters and its sensitization of erbium. These results are consistent with the literature reported decomposition of SiOx at elevated temperatures which in turn leads to the formation of Si clusters in the silicon oxide matrix.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".