Actively Tunable Metasurfaces via Plasmonic Nanogap Cavities with Sub-10-nm VO₂ Films.

ABSTRACT: Actively tunable optical materials integrated with engineered subwavelength structures could enable novel optoelectronic devices, including reconfigurable light sources and tunable on-chip spectral filters. The phase-change material vanadium dioxide (VO₂) provides a promising solid-state solution for dynamic tuning; however, previous demonstrations have been limited to thicker and often rough VO₂ films or require a lattice-matched substrate for growth. Here, sub-10-nm-thick VO₂ films are realized by atomic layer deposition (ALD) and integrated with plasmonic nanogap cavities to demonstrate tunable, spectrally selective absorption across 1200 nm in the near-infrared (NIR). Upon inducing the phase transition via heating, the absorption resonance is blue-shift

SUBMITTER: Boyce AM 

PROVIDER: S-EPMC9101075 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature