Erbium-doped Si<sub>1-<i>x</i></sub>Ge<sub><i>x</i></sub>/Si structures for light emitting diodes
Why this work is in the frame
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Bibliographic record
Abstract
LEDs have been fabricated from erbium-doped Si and Si<sub>1-x</sub>Ge<sub>x</sub> quantum wells, and exhibit radiation at 1.5 μm when operated in forward bias. The strained Si<sub>1-x</sub>Ge<sub>x</sub>/Si quantum wells were doped with erbium, either by implantation or during MBE growth, for two germanium fractions, 13% and 25% respectively, and their quality was monitored by transmission electron microscopy. PL measurements as a function of temperature exhibit a dependence of the high temperature signal quenching on the germanium fraction. The forward-bias EL and PL from the Er:Si<sub>1-x</sub>Ge<sub>x</sub>, exhibit different emission energies irrespective of whether the samples are ion implanted or doped during MBE growth. The energy changes are attributed to confinement of injected holes in the electroluminescence measurement by the quantum wells, and subsequent excitation of a different set of Er atoms which may be in the Si<sub>1-x</sub>Ge<sub>x</sub> host. Electric field effects have been eliminated by performing the EL and PL under identical conditions. This is very encouraging for the potential use of SiGe waveguides in future injection-type silicon-based LEDs.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.001 | 0.003 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.002 | 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 it