Ultracompact twisted silica taper for 20 kHz to 94 MHz ultrasound sensing
Bibliographic record
Abstract
An ultracompact twisted silica taper with an asymmetric structure is fabricated by fire-drawing two twisted single-mode fibers for broadband ultrasound sensing. A piezoelectric transducer (PZT), peaked at 3.7 MHz, is used as an ultrasound generator. A steel plate with a silica taper attached is adhered to the PZT and is used as the ultrasound propagation medium. The transmission spectrum of the silica taper has high contrast owing to multimode interference in this twisted silica structure. Specially, the taper waist length and waist diameter are optimized for the highest optical sensitivity with high contrast at high slope in the transmission spectrum. The ultrasound sensitivity is characterized by a different thickness of the steel plate from 0 to 2.36 mm to achieve the highest ultrasound frequency response. With the taper waist length of 5 mm, waist diameter of 5 µm, and steel thickness of 0 mm, a broadband ultrasound frequency of 20 kHz to 94.4 MHz can be detected at high harmonics of the PZT, verifying the high sensitivity of the compact twisted silica taper.
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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 | 0.001 |
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".