Photoassisted bottom-up construction of plasmonic nanocity

Herein, photoassisted self-construction of nanocity as a novel plasmonic metasurface was achieved. It is an ensemble of nanobuildings, and the height of each nanobuilding is greater than its depth. Plasmonic nanocity exhibits a vertical resonance mode in addition to distal longitudinal and proximal longitudinal resonance modes, such that it can be applied to chromatic angular polarizers, sophisticated image recording, and high density data storage. Further growth of nanobuildings to bulky and tall nanocuboids leads to asymmetric and dichroic scattering, which can be applied in security printing.