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Conversión de frecuencia no lineal ampliamente no degenerada en guías de onda de niobato de litio difuso con titanio
Optics express
|December 19, 2025
Resumen
Las guías de onda de niobato de litio difuso con titanio muestran desplazamientos espectrales en condiciones criogénicas debido a la piroelectricidad y la fotorrefractividad. Estos efectos causan variaciones menores, afectando el rendimiento de los dispositivos de fotónica cuántica.
Área de la Ciencia:
- Fotónica cuántica
- Ciencia de materiales
- Óptica integrada
Sus antecedentes:
- Las guías de onda de niobato de litio difuso con titanio (Ti:LiNbO3) son vitales para componentes de fotónica cuántica a temperatura ambiente.
- La operación criogénica es necesaria para la compatibilidad con fuentes de luz cuántica específicas y detectores superconductores.
Objetivo del estudio:
- Caracterizar el impacto de las condiciones criogénicas en el emparejamiento de fases y la guía de modos en guías de onda de Ti:LiNbO3.
- Evaluar las alteraciones espectrales en un proceso de generación paramétrica espontánea no degenerada (SPDC) bajo enfriamiento.
Principales métodos:
- Caracterización experimental de las longitudes de onda de emisión de SPDC (1556 nm y 950 nm) a temperaturas criogénicas.
- Comparación de las propiedades espectrales experimentales con modelos teóricos.
Principales resultados:
- Las condiciones criogénicas inducen efectos piroeléctricos y fotorrefractivos en las guías de onda de Ti:LiNbO3.
- Estos efectos causan variaciones espectrales pequeñas pero significativas dentro y entre los ciclos de enfriamiento.
- Las propiedades espectrales observadas se alinean con las predicciones teóricas a pesar de las alteraciones inducidas por la criogenia.
Conclusiones:
- Las guías de onda de Ti:LiNbO3 exhiben emparejamiento de fases y guía de modos alterados en condiciones criogénicas.
- La piroelectricidad y la fotorrefractividad son factores clave que influyen en el rendimiento a bajas temperaturas.
- Proporciona un punto de referencia para comparar otras plataformas de integración fotónica no lineal, como el niobato de litio de película delgada.
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