Bibliographic record
Abstract
Colloidal Quantum dots (CQDs) are solution synthesized nanocrystals that exhibit bright emission and narrow bandwidth, making them promising for light emission applications such as down-conversion luminescence, light amplification, and lasing. The emission wavelength of CQDs can also be controlled by the size of the nanocrystals potentially leading to tunable color light emission. In this work, CdSe-CdS-ZnS core-shell-shell quantum dots were synthesized and incorporated into a distributed feedback optical cavity to demonstrate sustained lasing. We show that the duration of lasing is limited by thermal runaway and that thermal management in the form of engineering the CQDs to form ultra-compact films and using a thermally conductive substrate can lead to efficient heat dissipation and therefore sustained lasing. The ultra-compact films were achieved by replacing long-chained organic ligands with inorganic-halide passivation. The new CQD films exhibited high modal gain (1,200 cm-1) and a low amplified spontaneous emission threshold of 50kw/cm2 (average peak power). Sustained lasing was first demonstrated for a microsecond, followed by fully continuous wave operation.
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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 | 0.000 |
| 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) | 0.001 | 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".