Before revision: Similar to other optical methods such as Surface Plasmon Resonance (SPR) or Bio-Layer Interferometry (BLI), it is based on measuring refractive index changes within an evanescent field near a sensor surface.
After revision: TestSimilar to other optical methods such as Surface Plasmon Resonance (SPR) or Bio-Layer Interferometry (BLI), it is based on measuring refractive index changes within an evanescent field near a sensor surface.