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Observación del flujo ramificado de luz
Anatoly Patsyk1, Uri Sivan1,2, Mordechai Segev3,4
1Physics Department and Solid State Institute, Technion-Israel Institute of Technology, Haifa, Israel.
Nature
|July 3, 2020
Resumen
Los científicos observaron el flujo ramificado de la luz en las películas de jabón. La luz forma canales intensos que se dividen, un fenómeno previamente visto en electrones y microondas, ahora demostrado en óptica.
Área de la Ciencia:
- Fenómenos de las ondas
- Óptica
- Sistemas desordenados
Sus antecedentes:
- El flujo ramificado, caracterizado por canales de intensidad de onda, se observó previamente para electrones y microondas.
- Este fenómeno se espera para varias ondas, incluido el océano, el sonido y los electrones relativistas en el grafeno.
- El flujo ramificado puede desencadenar eventos no lineales y transmitir energía en medios de dispersión.
Objetivo del estudio:
- Observar y caracterizar experimentalmente el flujo ramificado de la luz.
- Investigar el papel de los potenciales desordenados en la propagación de la luz.
- Explorar el potencial del flujo ramificado en óptica y campos relacionados.
Principales métodos:
- Utilizando membranas delgadas de jabón con variaciones de grosor suaves como un potencial desordenado.
- Observando la propagación de la luz a través de la película de jabón.
- Analizando la distribución de intensidad y los patrones de filamentación de la luz.
Principales resultados:
- Observación experimental del flujo ramificado de luz en películas de jabón.
- Demostrar que la luz se enfoca en filamentos que exhiben características de flujo ramificado.
- Los filamentos permanecieron colimados a pesar de las variaciones aleatorias del medio y la propagación lineal.
- Escalado observado de la distancia hasta el primer punto de ramificación y distribución de la intensidad.
Conclusiones:
- El flujo ramificado de luz se confirma experimentalmente en películas finas de jabón.
- Las variaciones de grosor suave en las películas actúan como potenciales desordenados correlacionados para la luz.
- Este hallazgo abre nuevas vías para estudiar el flujo ramificado en óptica, medios no lineales y sistemas activos.
- Se observó la interacción entre la luz y el trastorno de la película de jabón (presión de radiación, fuerza de gradiente).
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