The Special Issue of the Open Access journal  Crystals (MDPI, IF=2.061) is open for submissions. Two of our colleagues at the Department of Applied and Nonlinear Optics, Institute for Solid State Physics and Optics, Wigner RCP, László Kovács and Gábor Corrad are invited to be Editors of a Special Issue in the subject of New Trends in Lithium Niobate: From Bulk to Nanocrystals. The Special Issue is open for submissions in the given topic until 30 December 2020. The Call is accessible at the following link: