Extremely Large Refractive Indexes in Anodic Tantalum Pentoxide
Bibliographic record
Abstract
We have investigated optical properties of tantalum pentoxide films obtained by anodization of thin tantalum layers that were deposited on BK7 glass in an e-beam system. Ellipsometric studies were conducted in the wavelength range 246nm to 1679nm. The ellipsometric complex reflection coefficient versus λ was optimized using the same routine for all samples and provided values of n, k, and α. Some extreme n (up to 1000) and large n (up to 23) and α values were obtained for some samples in the wavelength range 455nm to 531nm. These extreme values probably result from small polycrystalline clusters dispersed in amorphous tantalum pentoxide. Such clusters usually are not charge neutral; therefore, they can interact with electric fields, such as incident light. As for the large n values these are probably resulting from possible presence of some impurity molecules.
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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 | 0.000 | 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 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.014 | 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".