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Transporte y localización de Anderson en redes fotónicas bidimensionales desordenadas

Tal Schwartz¹, Guy Bartal, Shmuel Fishman

¹Physics Department, Technion-Israel Institute of Technology, Haifa 32000, Israel.

|March 3, 2007

Resumen

Los investigadores observaron la localización de Anderson de la luz en una red fotónica desordenada. Este fenómeno transforma el transporte de luz de balístico a difusivo, lo que finalmente conduce a la localización, ofreciendo información sobre la interferencia de ondas y los efectos de desorden.

Área de la Ciencia:

Física del estado sólido física del estado sólido.
El fenómeno de las ondas es un fenómeno de ondas.
La óptica es la óptica.

Sus antecedentes:

La localización de Anderson describe la inmovilidad de los electrones en redes desordenadas debido a la interferencia de ondas.
Estudios anteriores se centraron en potenciales totalmente aleatorios, desviándose del modelo original de Anderson.
Los desafíos en la observación de la localización de Anderson en cristales atómicos incluyen potenciales e interacciones dependientes del tiempo.

Objetivo del estudio:

Observar experimentalmente la localización de Anderson en un potencial periódico perturbado.
Investigar la transición del transporte ligero de balístico a difusivo bajo desorden.
Explorar el impacto de las no linealidades en la localización de Anderson en redes fotónicas.

Principales métodos:

Utilizó una red fotónica bidimensional con fluctuaciones aleatorias superpuestas al potencial periódico.
Estudió la localización transversal de la propagación de la luz.
Analizó el cruce del transporte balístico al transporte difusivo y el inicio de la localización de Anderson.

Principales resultados:

Anderson demostró con éxito la localización de la luz en un potencial periódico perturbado.
Se observó una transición del transporte balístico al transporte difusivo a medida que aumentaba el desorden.
La localización de Anderson confirmada ocurre en niveles de trastorno más altos e investigados efectos de no linealidad.

Conclusiones:

La localización de Anderson se puede observar en sistemas fotónicos con potenciales periódicos desordenados.
Los hallazgos validan la teoría de Anderson en un nuevo contexto y ofrecen información sobre las interacciones onda-desorden.
Este trabajo abre caminos para explorar conceptos fundamentales en otros sistemas de ondas y estudiar la interacción de desorden y no linealidad.

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