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

Authors:
Ammar Aryan
Jean-Marc Routoure
Bruno Guillet
Pierre Langlois
Cédric Fur
Julien Gasnier
Carolina Adamo
Darrell G. Schlom
Laurence Méchin

Keywords: Bolometer; manganite; thermal detector.

Abstract:
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.

Pages: 61 to 65

Copyright: Copyright (c) IARIA, 2012

Publication date: August 19, 2012

Published in: conference

ISSN: 2308-3514

ISBN: 978-1-61208-208-0

Location: Rome, Italy

Dates: from August 19, 2012 to August 24, 2012