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
PHOTON SCANNING TUNNELING MICROSCOPE IN COMBINATION WITH A FORCE MICROSCOPE(full pdf)
MOERS MHP, TACK RG, VANHULST NF, BOLGER B
JOURNAL OF APPLIED PHYSICS
vol 75 issue 3: p1254-p1257 FEB 1 1994
The simultaneous operation of a photon scanning tunneling microscope with an atomic force microscope is presented. The use of standard atomic force silicon nitride cantilevers as near-field optical probes offers the possibility to combine the two methods. Vertical forces and torsion are detected simultaneously with the optical near field, which allows a comparison between topography and the optical signal. Images of an optical thin film (indium tin oxide) and a Langmuir-Blodgett layer (pentacosa diynoic acid) show absorption contrast with a lateral resolution of about 30 nm (based on edge steepness), which is well below the diffraction limit.