OPTICAL WAVEGUIDE, AND SPR SENSOR CELL AND COLORIMETRIC SENSOR CELL WHICH USE OPTICAL WAVEGUIDE

摘要

An optical waveguide in which the occurrence of a crack in a cladding layer is prevented, and the SPR sensor cell and the colorimetric sensor cell each using the optical waveguide can be provided. The optical waveguide according to the present invention includes a cladding layer and a core layer buried in the cladding layer so that at least one surface of the core layer is exposed. The cladding layer has a surface hardness of from HB to 2H.