Proceedings of the National Academy of Sciences, Volume 123, Issue 13, March 2026. SignificanceWe report a van der Waals semiconductor, crystalline As2S3, that exhibits an exceptionally large light-induced refractive index change (photorefraction Δnup to 0.3) together with controllable photoexpansion of up to 7%. These effects occur ...
PNAS published a clinical update in Research Highlights on 27 Mar 2026.
The item focuses on Giant photorefractive and photoexpansion effects in a van der Waals semiconductor.
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