High-angle annular dark fields Aberration-corrected STEM 1 Aberrations 1 Annular dark field scanning transmission electron microscopy 1 Anti ferroelectrics 1 Antiferroelectricity 1 Carrier dynamics 1 Crystal atomic structure 1 Dynamics 1 Frequency conversion devices 1 Germanium compounds 1 HAADF-STEM 1 High angle annular dark-field scanning transmission electron microscopy 1 High resolution transmission electron microscopy 1 Lead-Free 1 Microscopic views 1 Nanoregions 1 Native point defects 1 Niobium compounds 1 Performance 1 Photoluminescence 1 Polar nanoregions 1 Probes 1 Pump/probe spectroscopy 1 Scanning electron microscopy 1 Silver 1 Silver niobate 1 Spherical aberrations 1 Structure dynamics 1 Ultrafast lasers 1