Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter. Our current focus is on detection and sensing/imaging with an emphasis on the development of integrated photonics. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.

 

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.
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