Terahertz Emitters and Detectors Made on High-Resistivity InGaAsP:Fe Photoconductors
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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 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> s <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> . 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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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 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| 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.
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