Sub-wavelength focusing in loaded transmission line negative refractive index metamaterials
Bibliographic record
Abstract
We have previously demonstrated that a new class of planar Negative Refractive Index Metamaterials (NRIMs) can be constructed by periodically loading a host transmission line medium with inductors and capacitors in a dual (high-pass) configuration, and we have experimentally demonstrated focusing of a cylindrical wave inside such a NRIM, using a single-interface prototype. In this paper, we examine the conditions required to observe sub-wavelength focusing using a theory based on the plane-wave expansion of cylindrical waves, supplemented by permeability and permittivity functions characteristic to our NRIMs. This theory is validated by full-wave simulations and experimental data for a single-interface structure, and subsequently applied to the study of a two-interface (NRIM slab lens) structure. Finally, we present microwave circuit simulations showing clear, sub-wavelength focusing in a realizable NRIM lens.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.004 | 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".