Nonlocal far-field modeling of multichannel metastructures
Bibliographic record
Abstract
Periodic metastructures (including those with a macroperiodicity) have found numerous applications within the microwave to the optical regime. The analysis and synthesis of these structures generally requires the retrieval of equivalent material parameters (EMPs). To achieve this, the well-known approach is the locally periodic approximation (LPA), which is not always valid, e.g., when the angular dependence of the scattering behavior is pronounced. Here, through semianalytical closed-form expressions, we present an alternative approach to nonlocally model metastructures supporting multiple propagating Floquet-Bloch (FB) modes. This approach can be utilized to extract spatially dispersive (nonlocal) and/or position-dependent EMPs from the scattering parameters (S-parameters). The proposed framework can determine heterogeneous angle-dependent EMPs, replicating the scattering behavior of multichannel metastructures, and it provides an intermediary tool for the design of metastructures with macroperiodicity.
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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 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".