Integrated Optical Sciences
Biomolecules and nanostructures
The Optical Sciences group studies the interaction of light and matter at the nanoscale.
We do this by exploring ways to shape light and its environment. It's what we call
active and passive control. Our current focus is on the interaction of light with
biomolecules and nanostructures. We are part of Twente
University's Department of Science and Technology and member of the
Reflection type near field optical and atomic force microscope
For imaging of highly reflecting or opaque sample we have designed and realised a reflection type near-field optical set-up. The fibre probe is illuminated using an Ar-laser, while the reflected light (bright field and fluorescence) is separated using (dichroic) beamsplitters and polarisation optics. Langmuir-Blodgett monolayers and mixtures of fluorescent latex spheres have been imaged in reflection, simultaneously with shear force, absorption and polarised fluorescence contrast. Interestingly we found chemically specific adhesion contrast in the shear force signal.