Exciton-state mixing effects in photoinduced intersubband transitions in quantum-well structures
Bibliographic record
Abstract
We study the effects of exciton-state mixing on photoinduced conduction intersubband transitions in undoped quantum wells. Valence-band mixing and exciton-state mixing of different orbital angular momenta ($s$, $p$, $d$, etc.) are fully accounted for in the analysis. We show that, when the exciton-state mixing is significant, an infrared laser near resonant with two conduction subbands in quantum wells can excite intersubband excitations with different orbital angular momentum attributions, imitating the electronic transitions in quantum dots. In other words, instead of pure electronic states, the initial and final states of such intersubband transitions become mixed excitonic states, making their dipole moments strongly dependent not only on the $s$ component but also on $p$ and $d$ components. Our results show that the inclusion of all the orbital angular momenta gives accurate evaluation of the dipole moment of the photoinduced intersubband transitions, which may have been drastically overestimated by electron to electron transition model or underestimated by the exciton transition model without exciton-state mixing.
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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 | 0.001 |
| 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) | 0.001 | 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".