# Observation of surface frequency doubling in Si(111) mediated by a $$\chi ^4$$ process

Source: [Physics : nature.com subject feeds](https://www.nature.com/articles/s41598-026-70079-3) · 2026-11-11 · Physics
Page: https://themorning.science/story/observation-of-surface-frequency-doubling-in-si-111-mediated-by-a-chi-4-process-46a59a559dea6c3e
Kind: research · Impact: low

## In brief

- A Nature subject feed (dated 2026-11-11) lists a paper titled "Observation of surface frequency doubling in Si(111) mediated by a χ^4 process".
- The source provides only the title and link; no summary or methods are given.
- The paper is listed in a Nature journal feed under the article identifier s41598-026-70079-3.

## Why it matters

The title suggests a nonlinear optics measurement on silicon surfaces, which may matter to researchers studying surface characterisation or nonlinear optical processes, but the source gives no results to confirm this.

## Timeline

- 2026-11-11: Article listed in Nature subject feed

## Coverage

- [Observation of surface frequency doubling in Si(111) mediated by a $$\chi ^4$$ process](https://www.nature.com/articles/s41598-026-70079-3) — Physics : nature.com subject feeds, 2026-11-11

Tags: nonlinear optics, silicon surfaces, frequency doubling, surface physics

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Brief generated by AI (claude-haiku-5-5) from the reporting listed under Coverage. Headlines belong to their publishers. The Morning Science – https://themorning.science