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 Er 3+ (Er 2 O 3 ) centers. XRD and PL results show that increasing Er 2 O 3 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 Er 2 O 3 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 SiO x 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 machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".