Generation of subpicosecond infrared laser pulses produced by optical switching from low temperature grown gallium arsenide
Bibliographic record
Abstract
Pico/femtosecond optical semiconductor switching using both a reflection and. a transmission switch for 10.6 /spl mu/m has been used before to produce pulses as short as 130 fs. However, for many experiments, for example those involving intracavity switching, it is desirable to operate with a single reflection switch. To this end we investigated many semiconductor surface structures. In this talk we discuss the fastest and most reliable structure investigated which is capable of generating 10 /spl mu/m pulses shorter than 500 fs. The CO/sub 2/-laser pulse is created by reflection from a transient metallic-like semiconductor plasma. The speed of this switching technique relies on the ultra short carrier lifetime (/spl les/0.5ps) in low temperature molecular beam epitaxy (MBE) grown GaAs (LT-GaAs). Subpicosecond recombination time is achieved through the introduction of high density As-recombination centers during the growth of GaAs. Our experiments show that LT-GaAs, grown under the following conditions is ideally suited for optical semiconductor switching of below band gap IR radiation.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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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) | 0.001 | 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".