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.

 

A COMBINED NEAR-FIELD OPTICAL AND FORCE MICROSCOPE


MOERS MHP, TACK RG, VANHULST NF, BOLGER B
SCANNING MICROSCOPY
vol 7 issue 3: p789-p792 SEP 1993

Scanning near field optical microscopy (SNOM) is the optical alternative of the scanning probe microscopical techniques which enables a lateral resolution down to about 10 nm, unlimited by diffraction. Moreover, the potential of non- destructive imaging of chemical and biological samples with nanometer resolution in ambient conditions is a crucial advantage over electron microscopy. An integrated microscope has been constructed which allows simultaneous detection of optical and force interaction between a microfabricated SiN probe and a sample surface. Images are obtained in a transmission mode by detection of the light emanating from a ''super-tip'' in contact with the sample surface and illuminated by total internal reflection. Physical and technical aspects of the instrument are discussed and illustrated with typical images.
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