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[ABa2Cl][Ga4S8] (A = Rb, Cs): Materiales ópticos no lineales de amplio espectro obtenidos por ordenamiento de motivos
Bin-Wen Liu1, Xiao-Ming Jiang1, Hui-Yi Zeng1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Journal of the American Chemical Society
|May 30, 2020
Resumen
Los investigadores desarrollaron una nueva estrategia para transformar materiales centrosimétricos en no centrosimétricos, creando nuevos materiales ópticos no lineales (NLO) con un gran rendimiento tanto para aplicaciones visibles como infrarrojas.
Área de la Ciencia:
- Ciencias de los materiales
- Química del estado sólido
- Optoelectrónica y sus derivados
Sus antecedentes:
- La no centrosimetría (NCS) es esencial para los materiales ópticos no lineales (NLO) de segundo orden.
- Los materiales NLO existentes a menudo tienen limitaciones en el rango de transparencia o en el umbral de daño del láser.
- El desarrollo de nuevos materiales NCS con propiedades NLO mejoradas sigue siendo un desafío clave.
Objetivo del estudio:
- Introducir una nueva estrategia inducida por la sustitución de policatones para la transformación de materiales centrosimétricos (CS) en NCS.
- Síntesis y caracterización de nuevos calogenuros de inclusión de sales en el NCS.
- Investigar las propiedades NLO y las relaciones estructura-propiedad de los materiales sintetizados.
Principales métodos:
- Estrategia de sustitución por policatión aplicada a CS RbGaS2.
- Síntesis de nuevos calogenuros de inclusión de sales en el NCS: [ABa2Cl][Ga4S8] (A = Rb, Cs).
- Caracterización de las propiedades estructurales y ópticas, incluida la segunda generación armónica (SHG) y el umbral de daño inducido por láser (LIDT).
Principales resultados:
- Sintetizó con éxito dos nuevos compuestos NCS: [RbBa2Cl][Ga4S8] y [CsBa2Cl][Ga4S8].
- Se han mostrado intensidades de SHG fuertes y compatibles con la fase (10,4-15,3 x KDP a 1064 nm; 0,9-1,0 x AGS a 1910 nm).
- Se han demostrado altos LIDTs (11-12 x AGS) y amplias ventanas transparentes, lo que indica su idoneidad tanto para aplicaciones de NLO visibles como infrarrojas.
Conclusiones:
- La transformación de CS a NCS inducida por la sustitución de policatones es un enfoque eficaz para el diseño de nuevos materiales NLO.
- El embalaje ordenado de motivos Ga4S10 supertetraédricos T2, templados por policationes acéntricas, es responsable de las destacadas prestaciones de NLO.
- Estos nuevos materiales ofrecen una plataforma prometedora para aplicaciones avanzadas de NLO.
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