SURFACE PLASMON RESONANCE(SPR) SENSOR BASED ON MEASUREMENT OF RESONANCE ANGLE AND MEASUREMENT METHOD THEREOF

摘要

Provided are a surface plasmon resonance (SPR) sensor based on measurement of resonance angle and a measurement method thereof. The SPR sensor includes: a beam output device; a SPR sensor chip which comprises a dielectric layer, a metal layer contacting with object to be measured, and a sample pool in which the object to be measured is stored; a photo detecting device which is a differential type linear array of photodetectors comprising a plurality of photodetector cells, for receiving focus beam reflected by reflecting device of the SPR structure; and a tunable exterior field generating device, which generates an exterior field and applies the said exterior field to the dielectric layer of the SPR sensor chip to adjust the refractive index of the dielectric layer. A measurement method thereof is also provided. The invention presents the advantages of a wide dynamic measurement range, high degree of automatic measurement, compact structure, high stability, rapid response, and high resolution and linearity of measurement.