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Un ensamblaje natural en el chip de cristales de bandgap fotónicos de silicio
Y A Vlasov1, X Z Bo, J C Sturm
1NEC Research Institute, 4 Independence Way, Princeton, New Jersey 08540, USA.
Nature
|November 20, 2001
Resumen
Los investigadores desarrollaron cristales fotónicos de silicio monocristalino utilizando autoensamblaje de esfera coloidal. Estas estructuras exhiben una robusta brecha de banda fotónica, allanando el camino para los circuitos integrados totalmente ópticos.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- La óptica es la óptica.
- Nanotecnología La nanotecnología es la nanotecnología.
Sus antecedentes:
- Los cristales fotónicos de brecha de banda ofrecen control sobre la propagación de la luz, crucial para todos los circuitos integrados ópticos.
- Los métodos de fabricación convencionales para cristales fotónicos son complejos y costosos.
- El ensamblaje natural de esferas coloidales ofrece una ruta más simple, pero resulta en defectos que comprometen las bandas fotónicas.
Objetivo del estudio:
- Desarrollar un método para crear cristales fotónicos de silicio monocristalino de alta calidad.
- Para demostrar la supervivencia de la brecha de banda fotónica en estas estructuras.
- Explorar el potencial para aplicaciones de dispositivos a través de pasos de fabricación adicionales.
Principales métodos:
- Autoensamblaje de esferas coloidales en un sustrato de silicio para formar estructuras planas y monocristalinas.
- Caracterización de las propiedades de brecha de banda fotónica y densidades de defectos.
- Demostración de pasos de fabricación adicionales como el dopaje y el patrón.
Principales resultados:
- Se lograron cristales fotónicos de silicio monocristalino planar con bajas densidades de defectos.
- Reflexión de unidad observada en direcciones cristalinas específicas alrededor de 1,3 micrómetros, lo que confirma la supervivencia de una brecha de banda fotónica.
- Se realizó con éxito el dopaje y el patrón, lo que indica la idoneidad para la fabricación de dispositivos.
Conclusiones:
- El método de autoensamblaje de la esfera coloidal produce cristales fotónicos de silicio de alta calidad adecuados para aplicaciones ópticas.
- El control demostrado sobre la estructura y las propiedades abre posibilidades para dispositivos fotónicos avanzados.
- Este enfoque ofrece una ruta potencialmente más simple y más rentable para la fabricación de cristales fotónicos.
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