Absorption of photonic crystal textile in the mid infrared for thermoregulation

Assaf, S.; Boutghatin, Mohamed; Pennec, Yan; Korovin, A.; Treizebre, Anthony; Thomy, Vincent; Djafari-Rouhani, Bahram

Type de document :

Autre communication scientifique (congrès sans actes - poster - séminaire...): Communication dans un congrès avec actes

Titre :

Absorption of photonic crystal textile in the mid infrared for thermoregulation

Auteur(s) :

Assaf, S. [Auteur]
Boutghatin, Mohamed [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Pennec, Yan [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Korovin, A. [Auteur]
Treizebre, Anthony [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Bio-Micro-Electro-Mechanical Systems - IEMN [BIOMEMS - IEMN]
Thomy, Vincent [Auteur]

Bio-Micro-Electro-Mechanical Systems - IEMN [BIOMEMS - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Djafari-Rouhani, Bahram [Auteur]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Titre de la manifestation scientifique :

9th World Textile Conference on Textiles at the Crossroads, AUTEX 2019

Ville :

Gent

Pays :

Belgique

Date de début de la manifestation scientifique :

2019-06-11

Discipline(s) HAL :

Physique [physics]
Sciences de l'ingénieur [physics]

Résumé en anglais : [en]

A large part of the building energy consumption is attributed to temperature control using Heating, Ventilationand Air Conditioning (HVAC) systems. A decrease in this consumption, even slightly, will contribute to ...
Lire la suite >A large part of the building energy consumption is attributed to temperature control using Heating, Ventilationand Air Conditioning (HVAC) systems. A decrease in this consumption, even slightly, will contribute to bothenvironmental protection and costs saving. Toward this end, personal thermoregulation properties have beenrecently developed for the majority of people who spend their time in a sedentary state [1, 2]. Therefore, atremendous effort is necessary to develop smart wearable thermoregulating textiles which can respond to theimmediate temperature feeling of the wearer.We theoretically investigate the effect of absorbance of a photonic membrane of low refractive index on thehuman body emission at 34°C in the MIR range. The photonic membrane, embedded in air, is made ofBenzocyclobutene (BCB) and drilled following a triangular array of holes. We took into consideration theabsorption of the BCB by using its complex refractive index. All numerical results have been performed with thehelp of the Finite Element Method (FEM).We showed that the reflection and the transmission coefficients depend on the geometrical parameters of themembrane and found the occurrence of three peaks of reflection whose origin is due to the structuring of themembrane. One origin is due to the photonic guided modes inside the membrane, the second one comes from thelocal excitation of the electromagnetic field inside the air holes. The dependence of the geometrical parametershas been quantitatively highlighted through the definition of an efficiency coefficient. We found that, dependingon the geometrical parameters, the BCB membrane can absorb up to 80% of the emission of the human bodyemissivity in the wavelength range [7.5, 11.5] μm. We are currently studying the effect of the physicalparameters considering the behavior of the refractive index of both the membrane and the environment on theabsorption rate. The estimation of the temperature of the membrane under the absorption modulation of themembrane is also under consideration, following the thermal balance calculation. This work paves the way forthe design of a smart responsive photonic membrane. Integrated to a textile, such a membrane can greatlymitigate the energy demand for indoor heating and ultimately contributes to the relief of the climate issues.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL

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