SENSOR HAVING SLAB OPTICAL WAVEGUIDE USING PHOTOTHERMAL CONVERTING METHOD, AND DETECTING METHOD USING PHOTOTHERMAL CONVERTING METHOD

摘要

PROBLEM TO BE SOLVED: To reduce a size, to less susceptible to the vibration of a device itself and vibration of the air in a measuring circumstance, and to conduct detection and measurement of high sensitivity. ;SOLUTION: This sensor has a slab optical waveguide 1 where a transparent optical waveguide core layer 2 having and optical refractive index higher than that of a transparent substrate 3 is formed on the substrate 3, and utilizes a photothermal converting method for measuring a photothermal conversion effect when a sample 4 mounted on the core layer 2 is irradiated with light 7 from an upper or lower side to absorb the light 7, by detecting divergence convergence or deflection of probe light 9 getting incident into the core layer 2 to be reflected in its inside and to pass through the vicinity of the sample 4 by a photo-detecting means 13. A means 11 for limiting the probe light 9 incident on the photo-detecting means 13 is formed in the core layer 2, and the photo-detecting means 13 is provided to bring a detecting portion into contact with the core layer 2 to detect the variation of intensity of the probe light 9.;COPYRIGHT: (C)2000,JPO