Sensor, sensing system and sensing method

Abstract

A sensor is an optical resonator constituted by: a first reflecting body that exhibits semi transmissivity/semi reflectivity; a transparent body; and a second reflecting body that exhibits one of reflectivity and semi transmissivity/semi reflectivity, provided in this order from the light incident side. The sensor is configured such that the absorption peak of the measuring light beam by resonance in the optical resonator matches the absorption peak of the measuring light beam by local plasmon resonance generated at the surface and/or within the optical resonator. The sensor has absorption properties such that light of specific wavelengths are absorbed depending the mean complex refractive indices of the first and second reflecting bodies and the thickness of the transparent body. An emitted light beam is output from the first reflecting body. The physical properties of the emitted light beam that change according to the absorption properties are detected.

Dependencies are inferred from the claim text.