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Modulación gigante de la no linealidad óptica por ingeniería Floquet
Jun-Yi Shan1,2, M Ye3, H Chu1,2
1Department of Physics, California Institute of Technology, Pasadena, CA, USA.
Nature
|December 9, 2021
Resumen
Los investigadores lograron un control óptico ultrarrápido bajo demanda en trisulfuro de fósforo de manganeso (MnPS3). Este método demuestra la modulación gigante de la no linealidad óptica, allanando el camino para nuevos elementos ópticos.
Área de la Ciencia:
- Física de la materia condensada
- Los materiales cuánticos
- Óptica ultrarrápida
Sus antecedentes:
- La conducción periódica con luz puede manipular las propiedades del material cuántico en escalas de tiempo ultrarrápidas.
- Se han demostrado topologías de banda no triviales que inducen ópticamente, interacciones de espín y superconductividad.
- La ingeniería coherente de las propiedades ópticas sigue siendo menos comprendida.
Objetivo del estudio:
- Para demostrar el control coherente y la modulación gigante de la no linealidad óptica.
- Investigar el potencial para la ingeniería bajo demanda de propiedades ópticas en materiales cuánticos.
Principales métodos:
- Utilizando una fuerte conducción periódica con luz en el trisulfuro de fósforo de manganeso (MnPS3).
- Conduciendo lejos de la resonancia de la transición de manganeso d-d.
- Utilizando cálculos de la teoría de Floquet para el análisis.
Principales resultados:
- Intercambio coherente de la eficiencia de generación de segundo armónico óptico en una escala de tiempo de 100 femtosegundos.
- Se obtiene una relación de encendido-apagado superior a 10 en campos eléctricos de alta conducción (10^9 V/m).
- No se ha demostrado ninguna disipación medible durante el proceso de conmutación.
Conclusiones:
- El control coherente y la modulación gigante de la no linealidad óptica son alcanzables en MnPS3.
- El enfoque demostrado es aplicable a varios materiales aislantes.
- Este trabajo abre posibilidades para elementos ópticos no lineales de diseño dinámico.
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