Topological reconstruction of stretchedtransparent surface relief grating via opticaldiffraction pattern
2021
The optical characterization of transparent and stretchable
patterned surfaces replicated from the fabrication of quasicrystal
structures on azopolymer thin films is presented. The complexity of the
quasicrystal surface fabrication is obtained by superimposed multiple
light exposures. Azopolymer surface patterns are used as a replica molding
master. The microscopic elongation of nanocavities induced by macroscopic
stretchings of the elastomeric quasicrystal replication is characterized
via optical diffraction. An original numerical method is presented to
reconstruct the structured surface deduced from the optical diffraction
measurements. The measurements show that drastic topologic changes, e.g.,
going from cavities to a canal, happens on the surface. This could be
ingeniously used for creating actionable structured surfaces or
nanoparticles trapping surfaces.
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