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Optical characterization of 2D surface grating nanostructures (925 nm × 925 nm) fabricated by holographic DLIP on the contact lens. (a) Optical microscopy image of the 2D grating. (b) Transmission spectra measurements. Angle-resolved measurements of diffraction readouts in transmission mode upon illumination with three monochromatic beams: (c,d) 450 nm, (e,f) 532 nm, and (g,h) 635 nm. Scale bar = 5 cm.
