Terahertz Emitters and Detectors Made on High-Resistivity InGaAsP:Fe Photoconductors
Bibliographic record
Abstract
A terahertz (THz) time-domain spectrometer built entirely from a pair of emitter and detector made on ion-implanted InGaAsP:Fe substrates is characterized for the first time. THz waveforms are measured as a function of the excitation power and the emitter's bias voltage on different standard stripline photoconductive antennas. The photoconductive property of the implanted materials is further enhanced by a thermal annealing treatment. The photocarrier mobility in the photoconductive layer is extracted from the THz saturation and estimated at 5 cm2V-1s-1. The presence of an InP cap layer during the thermal annealing treatment is found to affect the resistivity profile of the implanted materials, which also impacts on the performance of the THz emitter. Under optimized conditions and triggered by 280 fs laser pulses at 1550 nm, the spectrometer offers a 1.4-THz 20-dB bandwidth and a spectrum with a 65-dB peak dynamic range.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".