Enhanced transmission through metamaterial-lined subwavelength apertures
Bibliographic record
Abstract
In the optical regime, the phenomenon of extraordinary transmission (EOT) through subwavelength apertures has been attributed to the interaction of surface plasmons formed at the interface between two media. This enhanced transmission is also evident in periodic structures in the microwave regime, and has been found to be related to the formation of leaky waves on a corrugated metallic surface (D. R. Jackson, J. Chen, R. Qiang, F. Capolino and A. A. Oliner, vol. 16, no. 26, Opt. Express 21271, Dec. 2008). Recently, it was shown that transmission through miniaturized circular waveguides (CWGs) can be vastly improved through the introduction of thin metamaterial (MTM) liners. An HE11 mode passband is introduced well below the natural cutoff frequency, in the regime in which the MTM liner exhibits epsilon-negative and near-zero (ENNZ) permittivity (J. G. Pollock, and A. K. Iyer, IEEE Trans. Microwave Theory Tech. vol. 61, no. 9, Sep. 2013). The present work offers a novel approach for EOT in the microwave regime by establishing the analogy between transmission through miniaturized MTM-lined CWGs and subwavelength apertures loaded using MTM liners. This work studies the transmission and reflection properties of square arrays of MTM-lined subwavelength circular holes in a metallic screen. A printed-circuit implementation for the ENNZ MTM liner demonstrates several-fold enhancements in transmission over empty apertures for diameters of fractions of a wavelength at the frequency of interest. The transmission responses also exhibit an antiresonance, observed at a slightly higher frequency compared to the transmission peak, which enables the usage of such MTM-infused screens for narrowband shielding applications. Parametric studies are also performed to evaluate the dependence of transmission and reflection on the angle of incidence and periodicity of the apertures.
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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 | 0.000 |
| 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 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".