Model of <i>in-situ</i> focusing of extreme ultraviolet high-order harmonics from a nanostructured MgO surface
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract We present a numerical model for the in-situ generation and focusing of extreme-ultraviolet (XUV) high harmonics via a Fresnel zone plate etched into a dielectric (MgO) surface. Our simulations show that propagation of the intense infrared field driving high-harmonic emission through the etched surface rings introduces well controlled amplitude and phase modulations of the XUV field emitted from the surface itself that enhance the focusing efficiency up to 25%, beyond that of both conventional amplitude-modulated transmission XUV zone plates as well as ideal phase-only zone plates. Rings with a width comparable to the wavelength of the infrared driver exhibit strongest XUV emission with a larger phase modulation due to enhancement of the infrared field. On the contrary, a smooth phase modulation is achieved in the outskirts of the zone plates, where the width of the rings is much smaller than the infrared driving wavelength. These findings highlight the potential of sub-wavelength metasurface design in optimizing nanostructured optical elements for XUV nano-spectroscopy and on-chip XUV beam shaping.&#xD;
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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