Quaternary III-V semiconductor compounds for integrated nonlinear optics
Bibliographic record
Abstract
In this study, we propose several designs for integrated waveguides based on quaternary III-V semiconductor compounds InGaAsP (on InP substrate) and AlGaAsSb (on GaSb substrate), and report on their fabrication and optical characterization. III-V semiconductor compounds tend to exhibit strong nonlinearities; these typically come along with undesirable effects such as nonlinear absorption. In quaternary III-V compounds, one has a good control over this characteristic. For instance, by shifting the band-gap wavelength through adjusting the material composition, one can change the range of wavelengths that can experience two-photon absorption. Therefore, it would be possible to minimize the losses due to nonlinear absorption [1]. Based on the possible band-gap wavelength and refractive index ranges that can be achieved in these two compounds, one can expect that both InGaAsP and AlGaAsSb waveguides can be suitable for wide-range wavelength conversion. InGaAsP waveguides can, for example, be co-integrated with InGaAsP laser sources to extend their operation ranges to longer wavelengths (2 μm and beyond). The properties of AlGaAsSb, on the other hand, allow passive waveguide devices operating in the Telecom C-band.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".