ИСТИНА

Metasurfaces of dielectric nanostructures — subdiffractive arrays of nanoantennas made of transparent materials — can enhance the interaction of light with matter, which has applications in many applications, including metasurfaces, holograms and optical filters. However, these devices are almost always passive in the sense that their optical properties are fixed at the production stage and cannot be modified afterwards. The free carrier injection mechanism into the nanoantenna material, either by using optical emission pulses [1] or by applying an external electric field [2], can be used to solve this problem. It is the second approach that will be considered in this research work. Metasurfaces with the possibility of modulation of their optical properties by external forces can become an effective technique in applied photonics. [1] Lu Ding, Dmitry Morits et al., “All-optical modulation in chains of silicon nanoantennas”, ACS Photonics 2020, 7, 4, 1001–1008 (2020); [2] Weifeng Zhang1 and Jianping Yao, “A fully reconfigurable waveguide Bragg grating for programmable photonic signal processing”, Nature Communications 9, 1396 (2018).