Terahertz Polarization Properties of Free-Standing Millimeter-Scale Carbon Nanotube Array Sheets Cut With Femtosecond Laser Pulses
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Bibliographic record
Abstract
Vertically-aligned millimeter-scale multiwall carbon nanotube arrays (CNTAs) grown by catalytic chemical vapour deposition were cut by femtosecond laser pulses into thin free-standing sheets of aligned carbon nanotubes. Terahertz (THz) time-domain spectroscopy was used to measure the polarization dependence of the transmittance of the CNTA sheets from 0.5-2.2 THz. CNTA sheets with thicknesses of 40 μm and 150 μm showed high extinction ratios at 1 THz of 25 dB and dB, respectively. Furthermore, the transmittance of the 40 μm CNTA sheet for THz polarization parallel to the carbon nanotubes decreased with increasing frequency, resulting in an extinction ratio of 34 dB at 2 THz exceeding that of a commercial wire-grid polarizer. The potential of laser-cut free-standing CNTA sheets as terahertz polarizers is discussed.
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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 | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| 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