An Optical Temperature Sensor Using Surface Plasmons

1 June 1993

journal article
Published by IOP Publishing in Japanese Journal of Applied Physics

Vol. 32 (6R) , 2716
https://doi.org/10.1143/jjap.32.2716

Abstract

The principles of an optical temperature sensor, using surface plasmon generation in a material with a large temperature-dependent refractive index, are presented. The sensor design consists of surface plasmon generation in a thin (500 Å) silver film overlaid with hydrogenated amorphous silicon (a-Si:H). A factor of three change in reflected light intensity, from a glass/Ag/a-Si:H interface, is obtained for a 40°C rise in temperature. The device is compatible with fibre optic technology for remote temperature sensing applications.

Keywords

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