Brewster Angle Microscope (BAM) EP3

The Accurion EP3-BAM is used to image thin films on solid or liquid substrates. To obtain image contrast, the BAM uses the principle that at a certain incidence (Brewster) angle the p-polarized laser beam is not reflected at all by the substrate-air interface. The Brewster angle depends only on the refractive index (RI) of the substrate and is equal to 53° in the case of a water substrate. At this incidence angle, nano-thick molecular and/or nanoparticle films that are spread at the water surface will modify locally the RI value, thus yielding a non-zero reflection coefficient and providing image contrast.

Instrument parameters: