DESIGN OF ARROW-B SPR SENSORS IN AQUEOUS ENVIRONMENT WITH THE SPECTRAL SHIFT METHOD

摘要

ARROW-B SPR sensors in aqueous environment with the spectral shift method have been investigated. Surface plas-mons' propagation constant strongly depends on wavelength. When a broadband light source is launched into the waveguide, the transmitted spectrum exhibits a narrow dip whose minimum is the resonance wavelength associated with the transfer of optical energy into surface plas-mons. The resonance wavelength shift with the sensed refractive index variation is studied, and the device is designed for aqueous environment application. The simulation results show that a resolution of 1.0 x 10~(-6) can be achieved, which is suitable for highly sensitive chemical sensing and biomolecular interaction analysis.