Hyperbolic Metamaterials via Hierarchical Block Copolymer Nanostructures

Hyperbolic metamaterials (HMMs) offer unconventional properties in the field of optics, enabling opportunities for confinement and propagation light at nanoscale. In-plane orientation optical axis, direction coinciding with anisotropy HMMs, is desirable a variety novel applications nanophotonics imaging. Here, method creating localized HMMs in-plane based on block copolymer (BCP) blend instability, introduced. The dewetting BCP thin film over topographically defined substrates generates droplets composed highly ordered lamellar nanostructures hierarchical configuration. represent valuable platform subsequent pattern transfer into Au/air HMM, exhibiting hyperbolic behavior broad wavelength range visible spectrum. A computed Purcell factor as high 32 580 nm supports strong reduction fluorescence lifetime defects nanodiamonds placed top HMM.