Optical seminar | 12 February 2021
Lithium niobate is an excellent and widely used material for nonlinear frequency conversion. Because of its strong optical nonlinearity and broad transparency region it has already found many applications in nanoscale integrated optics, e.g., optical circuits, fast electro-optical modulators, low-loss waveguides, etc. But nanostructuring of lithium niobate and fabrication of metasurfaces from it remained a challenge until recently. In this talk we will discuss current progress in nonlinear nanophotonics based on metasurfaces from lithium niobate: second-harmonic generation and spontaneous-parametric down-conversion.