title: Thermoreflectance temperature measurement with millimeter wave.
abstract: GigaHertz (GHz) thermoreflectance technique is developed to measure the transient temperature of metal and semiconductor materials located behind an opaque surface. The principle is based on the synchronous detection, using a commercial THz pyrometer, of a modulated millimeter wave (at 110 GHz) reflected by the sample hidden behind a shield layer. Measurements were performed on aluminum, copper, and silicon bulks hidden by a 5 cm thick Teflon plate. We report the first measurement of the thermoreflectance coefficient which exhibits a value 100 times higher at 2.8 mm radiation than those measured at visible wavelengths for both metallic and semiconductor materials. This giant thermoreflectance coefficient κ, close to 10(-3) K(-1) versus 10(-5) K(-1) for the visible domain, is very promising for future thermoreflectance applications.
authors.affiliation: I2M (Institut de Mécanique et d'Ingénierie de Bordeaux) UMR CNRS 5295, TREFLE Department, Esplanade des Arts et Métiers, F-33405 Talence Cedex, France.
authors.forename: C
authors.initials: C
authors.lastname: Pradere
authors.affiliation: I2M (Institut de Mécanique et d'Ingénierie de Bordeaux) UMR CNRS 5295, TREFLE Department, Esplanade des Arts et Métiers, F-33405 Talence Cedex, France.
authors.forename: J-P
authors.initials: JP
authors.lastname: Caumes
authors.affiliation: I2M (Institut de Mécanique et d'Ingénierie de Bordeaux) UMR CNRS 5295, TREFLE Department, Esplanade des Arts et Métiers, F-33405 Talence Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: BenKhemis
authors.affiliation: LOMA UMR 5798: CNRS-UB1, 351 Cours de la Libération, 33405 Talence Cedex, France.
authors.forename: G
authors.initials: G
authors.lastname: Pernot
authors.affiliation: I2M (Institut de Mécanique et d'Ingénierie de Bordeaux) UMR CNRS 5295, TREFLE Department, Esplanade des Arts et Métiers, F-33405 Talence Cedex, France.
authors.forename: E
authors.initials: E
authors.lastname: Palomo
authors.affiliation: LOMA UMR 5798: CNRS-UB1, 351 Cours de la Libération, 33405 Talence Cedex, France.
authors.forename: S
authors.initials: S
authors.lastname: Dilhaire
authors.affiliation: I2M (Institut de Mécanique et d'Ingénierie de Bordeaux) UMR CNRS 5295, TREFLE Department, Esplanade des Arts et Métiers, F-33405 Talence Cedex, France.
authors.forename: J-C
authors.initials: JC
authors.lastname: Batsale