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Realización de un aislante topológico fotónico tridimensional

  • 0State Key Laboratory of Modern Optical Instrumentation, The Electromagnetics Academy at Zhejiang University, Zhejiang University, Hangzhou, China.
Nature +

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11 de enero de 2019

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11 de enero de 2019

Ver abstracta en PubMed

Resumen

Este resumen es generado por máquina.

Los investigadores crearon un aislante topológico fotónico 3D, logrando una amplia brecha de banda topológica. Este avance permite un confinamiento robusto de la luz y la propagación en tres dimensiones para dispositivos fotónicos avanzados.

Área De La Ciencia

  • Fotónica y ciencias de los materiales
  • Física de la materia condensada
  • El electromagnetismo

Sus Antecedentes

  • Los cristales fotónicos limitan la luz pero carecen de protección topológica.
  • Los aislantes topológicos fotónicos bidimensionales (2D) ofrecen protección topológica pero están limitados a 2D.
  • El logro de una brecha de banda fotónica topológica totalmente tridimensional (3D) sigue siendo un desafío significativo.

Objetivo Del Estudio

  • Para demostrar experimentalmente un aislante topológico fotónico en 3D.
  • Para lograr un amplio espacio de banda topológico 3D para un confinamiento de luz robusto.
  • Para explorar el potencial de la fotónica topológica 3D en dispositivos avanzados.

Principales Métodos

  • Fabricación de un material compuesto utilizando patrones metálicos en placas de circuitos impresos.
  • Utilizando resonadores de anillo dividido con fuerte acoplamiento magnetoeléctrico.
  • Mediciones directas de campo para mapear las estructuras de banda y los estados de la superficie.

Principales Resultados

  • Demostración de un aislante topológico fotónico 3D con una brecha de banda topológica 3D de ancho de banda superior al 25%.
  • Observación de la estructura de la banda a granel con huecos y dispersión de los estados de superficie fotónica similar a la de Dirac.
  • Pruebas de una propagación fotónica robusta a lo largo de superficies no planas.

Conclusiones

  • El estudio extiende con éxito el concepto de aislantes topológicos 3D desde los fermiones hasta los bosones.
  • El material desarrollado proporciona una plataforma para aplicaciones fotónicas topológicas en 3D.
  • Este trabajo allana el camino para las cavidades fotónicas, circuitos y láseres topológicos en 3D.

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