Polarization-resolved terahertz time-domain imaging enabled by single pixel imaging
Why this work is in the frame
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Bibliographic record
Abstract
This work presents an efficient far-field single pixel imaging (SPI) system adapted to broadband, pulsed terahertz (THz) detection to successfully reconstruct polarization-resolved hyperspectral THz images of a polarizing sample of varying thickness. Polarizing S-cyclic Hadamard masks are used to efficiently encode the pulsed imaging beam polarization prior to interaction with the sample. In the reconstructed images, 320-ps-duration THz pulses are reconstructed for each spatial pixel. The corresponding hyperspectral THz images are then examined at frequencies between 0.10 and 1.00 THz with a frequency resolution of 3 GHz. A 17 × 19 three-dimensional image is presented to summarize the amplitude and phase of the reconstructed hyperspectral THz images in order to measure the refractive index and extinction coefficient of the sample polymethyl methacrylate material. Diffractive effects relating imaging wavelength and SPI mask pixel dimension are explored, in which diffraction broadening is significant for pixel sizes less than 1.2 wavelengths. This work has the potential to be the basis for future polarization-resolved THz imagers, particularly for those utilizing a single detector.
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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 | 0.000 | 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 it