Photovoltaic charge lithography on passive dielectric substrates using Fe:LiNbO3 stamps
Photovoltaic Fe:LiNbO3 is an outstanding material platform able tophoto-generate versatile charge patterns, useful for a broad variety ofapplications. However, in some cases, its photorefractive effect, lightabsorption, and active ferroelectric properties may interfere with the optimumoperation of ce...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Recursos: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/715909 |
| Acesso em linha: | http://hdl.handle.net/10486/715909 https://dx.doi.org/10.1002/aelm.202400327 |
| Access Level: | acceso abierto |
| Palavra-chave: | Bulk Photovoltaic Effect Charge Patterning Contact Electrification Lithium Niobate Optoelectronic Tweezers Física |
| Resumo: | Photovoltaic Fe:LiNbO3 is an outstanding material platform able tophoto-generate versatile charge patterns, useful for a broad variety ofapplications. However, in some cases, its photorefractive effect, lightabsorption, and active ferroelectric properties may interfere with the optimumoperation of certain devices based on Fe:LiNbO3. Here, a novel optoelectronicmethod is proposed and demonstrated to transfer photovoltaic chargepatterns from Fe:LiNbO3 to non-photovoltaic passive substrates, thusremoving these possible limitations. The method, denominated asphotovoltaic charge lithography (PVCL), resembles the operation of a stampand does not require external high-voltage supplies or electron/ion beams.Upon contact between the active Fe:LiNbO3 stamp and a passive dielectricsubstrate, the light-induced charge pattern can be faithfully mirrored on thepassive substrate. The imprinted pattern is probed and characterized bydielectrophoretic and electrophoretic particle trapping. The results reveal thatthe charge builds up on the passive substrate during contact, allowing chargetunability. Moreover, arbitrary charge distributions can be flexibly tailored,using scanning laser beams or spatially structured light. Overall, PVCL opensthe possibility of printing complex 1D/2D charge patterns of controlledpolarity on different passive dielectric materials, enhancing the technologicalpotential of Fe:LiNbO3 photovoltaic platforms |
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