Second Harmonic Generation in a Phase-Matched Sub-Micron SiO<sub>2</sub>-LiNbO<sub>3</sub>-Air Slab Waveguide
Bibliographic record
Abstract
All-optical wavelength conversion is crucial to optical communication and optical computing, since it is central to designing all-optical wavelength division multiplexers [1] and all-optical logic gates [2]. In particular, these applications rely on a structure capable of second harmonic generation (SHG). By realizing this nonlinear phenomenon in a waveguiding structure, SHG can be achieved on a compact platform compatible with photonic integrated circuits. A slab waveguide provides the most benefits, since its planar-nature is ideal for on-chip applications and because the waveguide core (i.e. nonlinear material) has a large area allowing for high pumping energies. Here, we measure SHG in a SiO2-LiNbO3-air slab waveguide having a core thickness of 760 nm. The measurements are in agreement with the performed phase-matching and modal overlap analyses.
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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".