Sensor chip and optical sample detection system equipped with the sensor chip

摘要

PROBLEM TO BE SOLVED: To provide a sensor chip and optical subject detection system including the sensor chip that largely reduce stray light, and can quantitatively measure an analyte with high precision and high sensitivity in the sensor chip which is used in the optical subject detection system such as an SPFS system and the like, and in which a length in a lateral direction of a flow channel part lid member loaded so as to cover a top part of a reaction layer is set longer than that of a dielectric member.SOLUTION: A sensor chip 30 comprises: a metal film 32; a dielectric member 34; a reaction layer 36; and a flow channel lid member 38, in which a length D in a lateral direction in a virtual cross section surface 40 is set longer with respect to a length E in the same direction of the dielectric member 34. An angle X1 formed with a lower surface 38a on a dielectric member 34 side of the flow channel lid member 38 and an end surface on an incidence surface side of the flow channel lid member 38 is formed into an obtuse angle, which in turn light to be guided with total reflection in the flow channel lid member 38 is completely eliminated.SELECTED DRAWING: Figure 1