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Reconfigurable Flat Optics with Programmable Reflection Amplitude Using Lithography-Free Phase-Change Materials Ultra Thin Films
Sebastien Cueff, Arnaud Taute, Antoine Bourgade +6
We experimentally demonstrate a very large dynamic optical reflection modulation from a simple unpatterned layered stack of phase-change materials ultrathin films. Specifically, we…
Metasurface optical characterization using quadriwave lateral shearing interferometry
Samira Khadir, Daniel Andrén, Ruggero Verre +5
An optical metasurface consists of a dense and usually non-uniform layer of scattering nanostructures behaving as a continuous and extremely thin optical component, with predefined…
Backward phase-matched second-harmonic generation from stacked metasurfaces
Timo Stolt, Jeonghyun Kim, Sébastien Héron +6
We demonstrate phase-matched second-harmonic generation (SHG) from three-dimensional metamaterials consisting of stacked metasurfaces. To achieve phase matching, we utilize a novel…
Controlling Cherenkov threshold with nonlocality
Hao Hu, Xiao Lin, Jingjing Zhang +4
Cherenkov radiation is generally believed to be threshold-free in hyperbolic metamaterials owing to the extremely large photonic density of states in classical local framework. Whi…