Optical Microscope video recordings of Isopropanol Wetting and Evaporation of the Nano-hole array grating in Optical Fibre

Optical microscope video recordings (40× magnification) of the optical fibre cross-section (125 µm diameter) have resolved the nano-hole array formed with 200 nm diameter and 1072 nm period in standard optical communication fibre (Corning, SMF-28). The recordings capture the filling and evaporation of isopropanol into and from the nano-hole array, with the meniscus confirming that the nano-holes are fully open from cladding-to-cladding without showing hole-to-hole break-through.