Large-area photonic crystals, quasicrystals, and Moiré quasicrystals fabricated on azobenzene molecular glass films by pyramidal interference lithography

Abstract

Custom acrylic multifaced pyramids were machined in-house and used to fabricate, in a single step, photonic crystals and quasicrystals on azobenzene molecular glass thin films with a surface area within the range of cm2. The obtained microcavity patterns have up to 8 -fold rotational symmetry depending on the number of pyramid faces used for laser inscription. The height of the resulting microcavities increases with the number of pyramid faces used and can even grow beyond the initial azobenzene film thickness. Furthermore, anisotropic and Moiré photonic structures were also fabricated upon changing the laser polarization and the number of exposures respectively.