Binary Huygens’ Metasurfaces: Experimental Demonstration of Simple and Efficient Near-Grazing Retroreflectors for TE and TM Polarizations
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Bibliographic record
Abstract
This paper investigates the retroreflective properties of a type of periodic metasurface, which is aggressively discretized to include only two cells per grating period. The resultant metasurface, which we term the binary Huygens' metasurface, dramatically simplifies the design toward highly efficient, low cost, and robust metasurface retroreflectors. Using this discretization method, we designed, simulated, and measured two binary Huygens' metasurfaces that retroreflect an incident plane wave at 82.87° from broadside, for TE and TM polarized waves, respectively. The simulated results for a 2-D infinite structure show power efficiencies of 94% (TE) and 99% (TM). The measured results show a power efficiency of 93% for both TE and TM polarizations. This shows that it is possible to obtain a high retroreflection power efficiency at an angle of choice using a very simple (slot or patch) metasurface design. The proposed design methodology allows one to achieve not only retroreflection but also reflection to arbitrary angles, with very high efficiency, which diversifies its uses.
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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 | 0.001 | 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 it