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Metasuperficies con Materiales de Cambio de Fase para la Gestión Térmica en el Infrarrojo de Onda Media

Viktoriia E Babicheva¹, Heungsoo Kim², Alberto Piqué²

¹Department of Electrical and Computer Engineering, University of New Mexico, MSC01 1100, 1 University of New Mexico, Albuquerque, NM 87131, USA.

|January 28, 2026

Resumen

Los recubrimientos de metasuperficies que utilizan dióxido de vanadio (VO2) permiten sistemas ópticos independientes de la temperatura. Estos novedosos recubrimientos enmascaran eficazmente las firmas térmicas manteniendo una emisión térmica constante en un amplio rango de temperaturas.

Área de la Ciencia:

Metamateriales y Fotónica; Óptica Infrarroja; Ciencia de Materiales

Sus antecedentes:

Las fluctuaciones de temperatura causan variaciones significativas en la emisión de cuerpo negro, complicando los sistemas ópticos y de detección.
La compensación de los cambios de radiancia espectral en la banda media del infrarrojo (MWIR) (3-5 µm) es un desafío debido a un aumento de casi 10 veces en la radiancia de 30 °C a 80 °C.
El dióxido de vanadio (VO2) presenta una transición de aislante a metal con potencial para la gestión térmica, pero las simples películas delgadas carecen de capacidades de compensación suficientes.

Objetivo del estudio:

Desarrollar sistemas ópticos y de detección independientes de la temperatura suprimiendo las variaciones de radiancia.
Demostrar recubrimientos de metasuperficies capaces de compensar grandes variaciones espectrales en la banda media del infrarrojo (MWIR).
Lograr una emisión térmica constante en un amplio rango de temperaturas (30 °C a 80 °C).

Principales métodos:

Fabricación de recubrimientos de metasuperficies que comprenden una matriz de antenas de metal-VO2-metal.
Ajuste de las resonancias de las antenas para contrarrestar la curva de radiación de cuerpo negro dependiente de la temperatura.
Combinación de antenas de varios tamaños laterales para rastrear colectivamente el cambio de Planck.

Principales resultados:

Se demostraron recubrimientos de metasuperficies que mantienen una emisión térmica constante en una longitud de onda objetivo de 30 °C a 80 °C.
Se logró la compensación mediante el seguimiento de la resonancia colectiva a través de múltiples tamaños de antena.
La metasuperficie exhibió un cambio de temperatura aparente insignificante, enmascarando eficazmente las firmas térmicas.

Conclusiones:

Los recubrimientos de metasuperficies ofrecen una solución viable para aplicaciones ópticas y de detección independientes de la temperatura.
Las antenas de metal-VO2-metal diseñadas proporcionan el contraste óptico y la derivada de temperatura necesarios para la compensación.
Este enfoque enmascara eficazmente las firmas térmicas para los detectores infrarrojos aprovechando las propiedades del VO2.

Palabras clave:

emisión térmica de Planck recubrimiento de emisividad diseñada transición aislante-metal antenas ópticas radiación térmica termocrómico dióxido de vanadio

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