Photonic crystal slab edge directional coupler for deflection sensing
Bibliographic record
Abstract
The design, fabrication, and transmission measurements of a photonic crystal slab edge directional coupler (PCDC) for submicron deflection sensing is presented. The dielectric modes between two structurally isolated photonic crystal edges allows for a directional coupler to be formed with low insertion loss and reduced coupling distances. The output transmission from the coupler can be related to the distance between neighbouring PC edges, thereby allowing it to be used as an intensity-based optomechanical sensor. PCDC sensors were fabricated by selectively etching the buried oxide (BOX) of surface micromachined silicon-on-insulator wafer. Based on transmission measurements, the sensitivity to horizontal separation between the edges of a fabricated PCDC of length 24.3 µm was evaluated to be 1.6 %/nm at 1495 nm. The transmission sensitivity to vertical separation between the PCDC edges of length 12.6 µm was calculated to be 0.25 %/nm, when the PCDC edges were initially displaced vertically by a distance of 300 nm. The PCDC sensors demonstrated here are compatible with broadband sources and do not depend on BOX thickness, reducing the probability of stiction.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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".