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Control de campo eléctrico de la actividad óptica natural en un helimágneto multiferroico
Ryoji Masuda1, Yoshio Kaneko2, Yoshinori Tokura1,2,3
1Department of Applied Physics and Quantum Phase Electronics Center (QPEC), University of Tokyo, Tokyo 113-8656, Japan.
Science (New York, N.Y.)
|April 30, 2021
Resumen
Los investigadores demostraron el control del campo eléctrico de la actividad óptica en el óxido de cobre multiferroico. Este descubrimiento utiliza la quiralidad inducida magnéticamente y el acoplamiento magnetoeléctrico para nuevos dispositivos ópticos potenciales.
Área de la Ciencia:
- Física de la materia condensada
- Ciencias de los materiales
- Óptica
Sus antecedentes:
- El control de la quiralidad es crucial en varias disciplinas científicas.
- El orden de espirales en materiales magnéticos puede inducir la quiralidad a través del acoplamiento magnetoeléctrico.
- Los materiales multiferroicos ofrecen propiedades únicas debido a las órdenes eléctricas y magnéticas acopladas.
Objetivo del estudio:
- Investigar la relación entre las excitaciones magnéticas y la actividad óptica en multiferroicos.
- Para demostrar el control del campo eléctrico sobre la actividad óptica natural.
- Para explorar el potencial de los multiferroicos en dispositivos ópticos quirales.
Principales métodos:
- Estudió el óxido multiferoico de cobre.
- Excitaciones magnéticas eléctricamente activas investigadas (electromagnos).
- Actividad óptica natural mejorada por resonancia.
Principales resultados:
- Se observó una actividad óptica natural mejorada por la resonancia ligada a los electromagnos.
- Control demostrado del campo eléctrico de la actividad óptica.
- Estableció una conexión entre la quiralidad inducida magnéticamente y el acoplamiento magnetoeléctrico.
Conclusiones:
- La quiralidad inducida magnéticamente en multiferroicos permite el control del campo eléctrico de la actividad óptica.
- Los fenómenos observados ponen de relieve el potencial de nuevos dispositivos ópticos basados en el control de la quiralidad.
- El óxido de cobre sirve como un sistema modelo para explorar estas propiedades ópticas multiferroicas.
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