Intersubband carrier dynamics in a biased GaAs/AlGaAs quantum-well infrared photodetector
Bibliographic record
Abstract
We present time and spectral resolved pump and probe studies of the intersubband dynamics in a bound to quasibound GaAs/AlGaAs quantum-well infrared photodetector dependent on the external electric field. Without bias, the excited electrons are scattered back to the ground subband with a time constant of about 2 ps. Subsequent intrasubband cooling is observed in the ground state, which gives rise to a relaxation component on a 50 ps time scale. With an applied electrical field, 35%–45% of the excited electrons escape to continuum states and are accelerated along the electrical field. Within time constants between 5 and 8 ps, the extended electrons are recaptured by wells in the low field bulk domain close to the collector contact. The redistribution of the carriers in the picosecond time regime and the screening of the external field due to the separation between electrons and donors leads to a change of the absorption spectrum for a time period shorter than the intrinsic response time of the electrical circuit.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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 | 0.001 |
| 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 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".