in this study, it was intended to investigate the persian native speakers’ perception of gerunds by three different elicitation techniques i.e., written, audio, and pictorial through translation. eighty intermediate learners of english were asked to select persian translation of the gerund formsin these elicitation techniques. they were asked to choose one option from a pair of written first la...

Abstract Metasurfaces have attracted significant attention in recent years due to their unprecedented light-manipulation abilities. However, most metasurfaces so far relied on external light excitation, prohibiting them from full on-chip integration. Inspired by the superheterodyne principle radio communications, here we propose a new waveguide-integrated metasurface architecture capable of con...