| abstract |
The present invention provides a chemical sensor and a chemical sensor device capable of further improving sensor sensitivity. A chemical sensor used for detecting a reaction of a sensor material with a test object based on an intensity of a surface plasmon polariton wave propagated on a sensor medium surface including the sensor material, wherein the sensor medium has a periodic structure. (Metal thin film 102) and a sensor material 104 provided on the periodic structure, and an integer multiple of the wavelength of the surface plasmon polariton wave generated by the irradiation light 105 applied to the interface between the periodic structure and the sensor material is The structure of the periodic structure substantially coincides with that of the periodic structure. [Selection] Figure 1 |