Light-Induced Diffraction Gratings on Liquid Metamaterial Metasurfaces

Metasurfaces, which represent specially designed structured interfaces, are the key elements of the contemporary flat optics, since it makes possible the effective control of the incident radiation. In this article, we suggest a metasurface formed by a liquid layer with suspended silver nanoparticles. The nanoparticle concentration is redistributed under the action of ponderomotive forces induced by an electromagnetic field to form a light-induced diffraction grating with parameters depending on incident radiation intensity. In this paper, the stability of the nanoparticle homogeneous distribution in the field of a normally incident plane light wave is studied, and possible nonlinear stationary states are found.