Novoselov Team Turns Arsenic Trisulfide Into a Photosensitive Clay, Sculpting 50,000-DPI Optics With a Single Continuous-Wave Laser
A PNAS paper from XPANCEO and Nobel laureate Konstantin Novoselov shows the van der Waals crystal As2S3 undergoes a refractive-index shift of 0.3 and expands up to 7% under ordinary light, enough to write 50,000-dpi patterns without lithography.
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