All-optical domain inversion in LiNbO3 crystals by visible continuous-wave laser irradiation
LiNbO3 is a distinguished multifunctional materialwhere ferroelectric domain engineering is of paramount impor-tance. This degree of freedom of the spontaneous polarizationremarkably enhances the applicability of LiNbO3, for instance, inphotonics. In this work, we report the first method for all-opt...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/713422 |
| Acceso en línea: | http://hdl.handle.net/10486/713422 https://dx.doi.org/10.1021/acsphotonics.4c00336 |
| Access Level: | acceso abierto |
| Palabra clave: | Lithium Niobate Ferroelectric Materials Domain inversion Laser Processing Bulk Photovoltaic Effect Interfacial Screening Física |
| Sumario: | LiNbO3 is a distinguished multifunctional materialwhere ferroelectric domain engineering is of paramount impor-tance. This degree of freedom of the spontaneous polarizationremarkably enhances the applicability of LiNbO3, for instance, inphotonics. In this work, we report the first method for all-opticaldomain inversion of LiNbO3 crystals using continuous-wave visiblelight. While we focus mainly on iron-doped LiNbO3, theapplicability of the method is also showcased in undoped congruentLiNbO3. The technique is simple, cheap, and readily accessible. Itrelies on ubiquitous elements: a light source with low/moderateintensity, basic optics, and a conductive surrounding medium, e.g.,water. Light-induced domain inversion is unequivocally demon-strated and characterized by combination of several experimentaltechniques: selective chemical etching, surface topography profilometry, pyroelectric trapping of charged microparticles, scanningelectron microscopy, and 3D Čerenkov microscopy. The influence of light intensity, exposure time, laser spot size, and surroundingmedium is thoroughly studied. To explain all-optical domain inversion, we propose a novel physical mechanism based on ananomalous interplay between the bulk photovoltaic effect and external electrostatic screening. Overall, our all-optical method offersstraightforward implementation of LiNbO3 ferroelectric domain engineering, potentially sparking new research endeavors aimed atnovel optoelectronic applications of photovoltaic LiNbO3 platforms |
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