Femtosecond laser written photonic circuits in diamond for quantum information
Bibliographic record
Abstract
Diamond's nitrogen-vacancy (NV) defect shows great promise as a quantum bit because of their long electron spin coherence time and since they can be located, manipulated and read out using optical methods. However due to its chemical inertness, a photonic manufacturing toolkit akin to silica and silicon photonics has yet to be developed for diamond. We describe how femtosecond laser fabrication can be applied to form 3D integrated optical circuits in diamond, which can optically link NV centers and help make the diamond-based quantum computer a reality. We apply μRaman spectroscopy to show amorphization in the laser-modified tracks, allowing us to produce waveguides by compressive stress between two closely spaced damage tracks. In addition, we apply confocal fluorescence microscopy to show that within the laser-inscribed waveguides, the bulk properties of the NV centers are preserved.
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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 | 0.001 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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; both teacher heads agree on what is shown here.
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".