The natural progression in developing the metasurface is to manipulate its optical properties without changing the physical structure. These class of metasurface is termed as “active metasurface”. In this work, we demonstrate an electrically tunable active metasurface comprise of plasmonic nano-antenna and epsilon-near zero (ENZ) material. Our result shows the active tuning of ENZ-LSP (local surface plasmon) hybrid mode that leverage the outstanding field confinement of plasmonic nanoantenna and distinctive tunable optical properties of ENZ layer.

Dipa Ghindani

Tampere University