Diffraction-limited imaging with monolayer 2D material-based ultrathin flat lenses

摘要

a Schematic of femtosecond laser fabrication of a monolayer TMDC lens. Inset: (i) AFM image of a monolayer TMDC (WSe2 in this case) single crystal, and (ii) STEM image of the monolayer TMDC (WSe2 in this case) single crystal. b Schematic of femtosecond laser-induced generation of MOx nanoparticles. c, d Optical microscopic image and Raman E12g band intensity image of a monolayer TMDC (WSe2 in this case) lens. e AFM image of the monolayer TMDC (WSe2 in this case) lens and the cross-sectional profile