Observation of superoscillation moiré superlattices

Superoscillation (SO) wavefunctions in light waves, which locally oscillate faster than its fastest Fourier component, have enhanced optical technologies beyond diffraction limits but have not yet been controlled in 2D lattices. Here, we report the 2D superoscillation lattices (SOLs) with controlled symmetries, where the local wavevector can be ∼700 times larger than the global maximal wavevector (k0) in a localized region ∼100 times smaller than the global minimal wavelength (λ0). We also demonstrate the superoscillation superlattices (SOSLs) as twisted bilayer moiré patterns of two SOLs; akin to the magic angle tuning in advanced twistronics, we can continually tune the on-demand SO with local maximal wavevector in a range of 450k0 to 700k0 and with ∼λ0/100 to λ0/1000. The SOSL will advance optical imaging and metrology into extreme higher-dimensional superresolution. © The Authors. Published by SPIE and CLP under a Creative Commons Attribution 4.0 International License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.