Science Daily June 20, 2022
An class of metasurface functionalities is associated with asymmetry in both the generation and transmission of light with respect to reversals of the positions of emitters and receivers. The nonlinear light–matter interaction in metasurfaces offers a promising pathway towards miniaturization of the asymmetric control of light. An international team of researchers (Germany, Australia, Singapore) has demonstrated asymmetric parametric generation of light in nonlinear metasurfaces by assembling dissimilar nonlinear dielectric resonators into translucent metasurfaces that produce images in the visible spectral range on being illuminated by infrared radiation. By design, the metasurfaces produce different and completely independent images for the reversed direction of illumination, that is, when the positions of the infrared emitter and the visible light receiver are exchanged. The work paves the way towards novel nanophotonic components via dense integration of large quantities of nonlinear resonators into compact metasurface designs…read more. TECHNICAL ARTICLE
Concept of asymmetric parametric generation of images with a nonlinear metasurface. Credit: Nature Photonics (2022)Â