09:30 〜 11:30
▲ [14a-PB3-5] Tunable phase detection sensitivity of grating-coupled surface plasmon resonance (SPR) Sensor in a Phase-Shift Interferometry (PSI) Image System
キーワード：surface plasmon resonance,grating,phase shift interferometry
The surface plasmon resonance (SPR) phenomenon has commonly been applied in bio-chemical sensors. There are two major coupling mechanisms, a prism or a grating coupler. The grating-coupled sensor chip can be fabricated by low cost nano-imprinting technique. For the detection method, intensity or phase of incident light can be used. In our previous study, we report a phase detection method for the SPR sensor can be tuned by simply rotating the analyzer in a heterodyne interferometer (HI) system. In this paper, we apply this method in an image type measurement to a grating- coupled SPR (GCSPR) sensor by using liquid crystal (LC) phase-shift interferometry (PSI). A prism-coupled SPR using PSI has been reported. Comparing with our previous HI system, the major advantage of the image type PSI system can perform multi-channel measurement.