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Redes de fosfuro de galio macroporoso fuertemente fotónicas y macroporosas
Schuurmans1, Vanmaekelbergh, van de Lagemaat J
1Van der Waals-Zeeman Instituut, Universiteit van Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands. Debye Instituut, Universiteit Utrecht, Post Office Box 80000, 3508 TA Utrecht, The Netherlands.
Science (New York, N.Y.)
|April 2, 1999
Resumen
Los investigadores desarrollaron un nuevo método para crear fosfuro de galio poroso (GaP) con propiedades controlables de dispersión de luz. Este material macroporoso de GaP muestra una fuerte dispersión de la luz, especialmente cuando está lleno de aire.
Área de la Ciencia:
- Ciencia de los materiales Ciencia de los materiales.
- Nanotecnología La nanotecnología es la nanotecnología.
- La óptica es la óptica.
Sus antecedentes:
- El fosfuro de galio (GaP) es un semiconductor con aplicaciones potenciales en la optoelectrónica.
- El control de la nanoestructura de GaP puede ajustar sus propiedades ópticas.
- Fabricar macroporos en GaP presenta desafíos para el diseño de materiales.
Objetivo del estudio:
- Desarrollar una técnica de grabado electroquímico foto-asistido para la creación de fosfuro de galio macroporoso (GaP).
- Investigar las propiedades estructurales y ópticas de la macroporosa GaP. fabricada.
- Para demostrar el control sobre la dispersión de la luz mediante la sintonización de las características de los poros y los medios de llenado.
Principales métodos:
- El grabado electroquímico fotográfico asistido de GaP. monocristalino.
- Microscopía electrónica de barrido (SEM) para el análisis estructural.
- Difracción de rayos X (XRD) para obtener información cristalográfica.
- Mediciones de transmisión óptica para evaluar la dispersión de la luz.
Principales resultados:
- Fabricado con éxito en 3D interconectado macroporoso GaP redes con ~ 150 nm poros.
- Confirmó la naturaleza desordenada y no absorbente de las estructuras macroporosas.
- Se ha demostrado una fuerte dispersión de la luz, con una eficiencia ajustable mediante el llenado de poros.
- GaP macroporoso lleno de aire identificado como el que tiene la mayor dispersión para la luz visible.
Conclusiones:
- El grabado electroquímico fotoasistido desarrollado es un método eficaz para crear GaP macroporoso sintonizable.
- El GaP macroporoso resultante exhibe una dispersión de luz significativa, útil para aplicaciones fotónicas.
- El control del índice de refracción del medio de llenado de poros permite la modulación de la fuerza fotónica.
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