Localización anómala de la luz en superredes fotónicas unidimensionales desordenadas

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D Aristizábal-Giraldo
E Reyes-Gómez

Keywords

Localización de Anderson, anomalías de Brewster, superredes fotónicas.

Resumen

La localización de Anderson de la luz en superredes fotónicas desordenadas unidimensionales es estudiada teóricamente. El sistema se considera compuesto de capas alternadas dispersivas y no dispersivas de diferentes espesores aleatorios. Las capas dispersivas de la heteroestructura están caracterizadas por permitividades eléctricas y permeabilidades magnéticas tipo Drude dependientes de la frecuencia. Los resultados numéricos para la longitud de la localización son obtenidos mediante un modelo analítico, solo válido en caso de desorden débil, y también a través de la definición general que involucra la transmisividad del sistema multicapas. Las dependencias anómalas λ4 y λ-4 de la longitud de localización en superredes fotónicas desordenadas son obtenidas, en ciertos casos, en los límites de longitudes de onda larga y corta, respectivamente. 


PACS: 78.67.Pt; 42.25.-p; 46.65.+g; 72.15.Rn

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