Optical Characterisation of La0.7Sr0.3MnO3 Thin Film Based Uncooled Bolometers

Ammar Aryan (1) , Jean-Marc Routoure (1) , Bruno Guillet (1) , Pierre Langlois (1) , Cédric Fur (1) , Julien Gasnier (1) , Carolina Adamo (2) , Darrell G. Schlom (2, 3) , Laurence Méchin (1)

1 Equipe Electronique - Laboratoire GREYC - UMR6072
2 Department of Materials Science and Engineering, Cornell University, USA
3 KI-NANO - Kavli Institute of Nanosciences [Delft]

This paper reports the potentialities of the manganese oxide La0.7Sr0.3MnO3 (LSMO) for the realization of uncooled thermal detectors. Close to room temperature, LSMO exhibits a metal-to-insulator transition, where a large change of electrical resistance versus temperature occurs. The tested sample is a 100 nm thick epitaxial LSMO thin film deposited on a SrTiO3 buffered Si substrate. The optical responsivity and electrical noise were measured in a frequency range of 1 Hz-100 kHz, thus enabling the estimation of specific detectivity. It is shown that due to the very low 1/f noise level, in this epitaxial film deposited on silicon wafer, LSMO thermal detectors can exhibit competitive performances at room temperature.

Mots clés: Bolometer; manganite; thermal detector

Domaines: Sciences de l'ingénieur [physics]; Micro et nanotechnologies/Microélectronique

Ammar Aryan, Jean-Marc Routoure, Bruno Guillet, Pierre Langlois, Cédric Fur, et al.. Optical Characterisation of La0.7Sr0.3MnO3 Thin Film Based Uncooled Bolometers. SENSORDEVICES 2012 (The third International Conference on Sensor Device Technologies and Applications), Aug 2012, rome, Italy. p.61-65. ⟨hal-00976640⟩