Meta-Optics with Lithium Niobate
Abstract
The rapid development of metasurfaces - 2D ensembles of engineered nanostructures - is presently fostering a steady drive towards the miniaturization of many optical functionalities and devices to a subwavelength size. The material platforms for optical metasurfaces are rapidly expanding and for the past few years, we are seeing a surge in establishing meta-optical elements from high-index, highly transparent materials with strong nonlinear and electro-optic properties. Crystalline lithium niobate (LN), a prime material of choice in integrated photonics, has shown great promise for future meta-optical components, thanks to its large electro-optical coefficient, second-order nonlinear response and broad transparency window ranging from the visible to the mid-infrared. Recent advances in nanofabrication technology have indeed marked a new milestone in the miniaturization of LN platforms, hence enabling the first demonstrations of LN-based metasurfaces. These seminal works set the first steppingstone towards the realization of ultra-flat monolithic nonlinear light sources with emission ranging from the visible to the infrared, efficient sources of correlated photon pairs, as well as electro-optical devices. Here, we review these recent advances, discussing potential perspectives for applications in light conversion and modulation shaping as well as quantum optics, with a critical eye on the potential setbacks and limitations of this emerging field.
Cite
@article{arxiv.2211.00359,
title = {Meta-Optics with Lithium Niobate},
author = {Anna Fedotova and Luca Carletti and Attilio Zilli and Frank Setzpfandt and Isabelle Staude and Andrea Toma and Marco Finazzi and Costantino De Angelis and Thomas Pertsch and Dragomir N. Neshev and Michele Celebrano},
journal= {arXiv preprint arXiv:2211.00359},
year = {2022}
}
Comments
45 Pages, 6 Figures