Optical Autocorrelator Based on InSe-Integrated Silicon Waveguide
Bibliographic record
Abstract
We demonstrate an on-chip single-shot autocorrelator by integrating few-layer InSe onto a silicon waveguide. With the strong second-order nonlinearity of InSe, a strong second harmonic generation (SHG) signal happens when counter-propagating pulses overlap within the InSe-integrated silicon waveguide. By mapping the spatial intensity distribution of the SHG signal into the time domain, the temporal profile of the pulse and group index of the waveguide modes were characterized successfully. Benefiting from the large second-order nonlinearity of InSe and the enhanced light–matter interaction provided by the silicon nanophotonic structure, our device can operate with pulse peak power down to 11 mW that is over two orders lower than that of the conventional integrated silicon autocorrelators, reaching a sensitivity of 2.4 × 10 –8 W 2 . Our device demonstrates the promising potential of ultrafast optical pulse measurements in photonic integrated circuits.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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) | 0.000 | 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 teacher head, 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".