SURFACE PLASMON RESONANCE ANGLE DETECTION DEVICE AND DETECTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide a sensor chip structure of SPR angle detection device capable of accurately detecting a resonance angle while a glass plate and a prism are bonded to each other without mixing air between them. SOLUTION: The surface plasmon resonance angle detection device 1 applies light from a light source 19 to the sample solution of a sensor chip where a prism 5 is bonded to a surface in that no metal thin film is formed of a glass substrate 17 where the metal thin film is formed, detects a resonance angle according to reflection light intensity from the metal thin film, and specifies a sample. An elastic sheet 33 whose refractive index nearly matches with that of the prism 5 and the glass substrate 17, which can be elastically deformed in a plane shape, and where a number of grooves are formed on opposite surfaces is provided between the prism 5 and the glass substrate 17, thus enabling the prism 5 and the glass substrate 17 to adhere to each other.