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Diseño y modelado de un resonador GaAs de doble ranura en forma de ojo para la detección de CO2
Faezeh Pakfetrat1, Mahdi Bahadoran2, Shadab Dabagh3,4
1Department of Physics, Shiraz University of Technology, Shiraz,, 31371555, Fars, Iran.
Scientific reports
|August 29, 2025
Resumen
Un nuevo sensor de resonancia en forma de ojo (ESMRR) ofrece una detección altamente sensible de dióxido de carbono (CO2). Este nuevo dispositivo alcanza un límite de detección bajo, crucial para el monitoreo ambiental y de salud.
Área de la Ciencia:
- Fotónica y detección óptica
- Tecnología de seguimiento del medio ambiente
- Ciencias de los materiales para sensores
Sus antecedentes:
- El monitoreo del dióxido de carbono (CO2) es vital para el medio ambiente y la salud humana.
- Los sensores de gases existentes a menudo carecen de la sensibilidad y resolución requeridas.
- Los sensores de índice de refracción (RI) ofrecen una vía prometedora para la detección de gases sensibles.
Objetivo del estudio:
- Diseñar y evaluar numéricamente un nuevo sensor RI de alta sensibilidad para la detección de medios gaseosos.
- Investigar una estructura de resonador de microrringo en forma de ojo (ESMRR) para mejorar el rendimiento de la detección.
- Evaluar la idoneidad del sensor para el monitoreo preciso del dióxido de carbono (CO2).
Principales métodos:
- Simulación numérica y diseño de una estructura de resonador de microanillo de doble ranura.
- Utilizando una guía de onda de núcleo de doble ranura de GaAs en un sustrato de Al0.5Ga0.5As.
- Aplicación de la regla de Mason para la derivación de la función de transferencia óptica y var-FDTD para el análisis numérico.
Principales resultados:
- Se ha logrado un rango espectral libre extendido (FSR) de 137,68 nm.
- Se ha demostrado una sensibilidad a granel de 1217,39 nm/RIU y una resolución de 4,93 × 10-6 RIU.
- Se ha informado de una sensibilidad al CO2 de 24,4 pm/ppm con un límite de detección de 0,82 ppm.
Conclusiones:
- El sensor ESMRR propuesto presenta una alta sensibilidad y resolución para la detección de gases.
- El diseño del sensor es eficaz para el monitoreo preciso del dióxido de carbono (CO2).
- Esta tecnología tiene potencial para aplicaciones ambientales y de seguridad sanitaria.
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