Ultrafast Radiative Recombination Engineering in InGaN/GaN Quantum Wells through Temperature, Alloy Fraction and Layer's Width Tuning for Photonics
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Bibliographic record
Abstract
Abstract Radiative lifetime (RT) on the picosecond to femtosecond scale plays a key role in enabling ultrafast optoelectronic technologies. This study investigates the RT in InGaN/GaN quantum wells (QWs), focusing on the effects of well thickness, temperature, and indium (In) composition using the finite element method. The results show a significant dependence of RT on these parameters for both subband (ISB) and band‐to‐band (BTB) recombination. Specifically, radiative lifetime for ISB transitions extend to nanosecond timescales, with values reaching up to 6 ns, reflecting reduced wave function overlap and lower recombination probabilities at higher temperatures. In contrast, BTB recombination exhibits much faster dynamics in the fs range, with lifetimes as short as 10 fs, which is critical for high‐speed applications. This research highlights the importance of precisely controlling QWs parameters, as well as internal and external factors, to optimize device performance in emerging InGaN‐based ultrafast technologies.
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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 | 0.000 | 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 it