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
Multi-detection and polarisation contrast in scanning near- field optical microscopy in reflection(full pdf)
Jalocha A, Moers MHP, Ruiter AGT, vanHulst NF
vol 61 issue 1-4: p221-p226 DEC 1995
We present a scanning near-field optical microscope operating in reflection suitable for simultaneous bright field and fluorescence imaging. A non-coated pulled optical fibre is used in true reflection mode, i.e. both as emitter and collector. Beam splitters, dichroic mirrors and polarisers are combined to discriminate the different wavelength and polarisation signals. The distance between fibre and sample is controlled by shear force feedback. Bright field and fluorescence images with polarisation contrast of dielectric samples have been obtained with 200 nm lateral resolution. We show the fluorescence polarisation dependence with the molecular orientation in application to Langmuir-Blodgett thin film domains.