Controlling Photoexcited Carrier Relaxation Through Phonon Management in GaAs/AlAs Superlattices
Bibliographic record
Abstract
Superlattice structures have been subject of investigation to understand the hampered photoexcited carrier (PC) cooling since the first evidence of slow hot carrier cooling in AlGaAs /GaAs superlattices, compared to bulk GaAs superlattices by Rosenwack et al. It is believed that this slow carrier relaxation is somewhat caused by phonon-bottleneck effect and can be achieved by blocking one or more of energy relaxing mechanisms namely Klemens and/or Ridley. Both decays are highly material properties dependent and rely on the energy difference between lowest optical and highest acoustic phonon branches. Superlatticing provides a plausible way to tune phononic properties and provides a way to study phononic properties dependent carrier dynamics. Through spectral and time resolved photoluminescence measurements of phononically tailored GaAs/AlAs superlattices, we provide a novel way to achieve slower carrier cooling.
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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 | 0.001 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 0.003 |
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; both teacher heads agree on what is shown here.
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".