Abstract: Template-assisted self-assembly is a scalable nanofabrication technique in which elastomeric pre-patterned stamps are used to induce long range order from a colloidal dispersion used as ink. Metal colloids or perovskite nanocrystals are used herein to fabricate high quality and large area 2D photonic crystals supporting narrow lattice resonances and chiral metasurfaces in which circularly polarized luminescence is observed.

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