Mid-infrared spectroscopic thermotransmittance measurements in dielectric materials for thermal imaging - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2024

Mid-infrared spectroscopic thermotransmittance measurements in dielectric materials for thermal imaging

Résumé

Thermal considerations affect the performance of most microsystems. Although surface techniques can give information on the thermal properties within the material or about buried heat sources and defects, mapping temperature and thermal properties in three dimension (3D) is critical and has not been addressed yet. Infrared thermography, commonly used for opaque materials, is not adapted to semi-transparent samples such as microfluidic chips or semiconductor materials in the infrared range. This work aims at answering these needs by using the variations of transmittance with temperature to obtain information on the temperature within the thickness of the sample. We use a tunable mid-infrared light source combined with an infrared camera to measure these variations of transmittance in a glass wafer. We couple this technique with a thermal model to extract the thermotransmittance coefficient—the coefficient of temperature variation of the transmittance. We then introduce a semiempirical model based on Lorentz oscillators to estimate the temperature-dependent optical properties of our sample in the mid-IR spectral range. Combined with the measurement, this paper reports the spectroscopic behavior of the thermotransmittance coefficient in the mid-IR range and a way to predict it.

Mots clés

Fichier principal
Vignette du fichier
I2M_APL23-AR-09215.pdf (707.85 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-04467569 , version 1 (20-02-2024)

Identifiants

Citer

C. Bourges, Stéphane Chevalier, Jeremie Maire, Alain Sommier, Christophe Pradere, et al.. Mid-infrared spectroscopic thermotransmittance measurements in dielectric materials for thermal imaging. Applied Physics Letters, 2024, 124 (1), ⟨10.1063/5.0176689⟩. ⟨hal-04467569⟩
15 Consultations
4 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More