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.

 

HIGH-RESOLUTION IMAGING OF DIELECTRIC SURFACES WITH AN EVANESCENT FIELD OPTICAL MICROSCOPE

(full pdf)

VANHULST NF, SEGERINK FB, BOLGER B
OPTICS COMMUNICATIONS
vol 87 issue 5-6: p212-p218 FEB 15 1992

An evanescent field optical microscope (EFOM) is presented which employs frustrated total internal reflection o­n a localized scale by scanning a dielectric tip in close proximity to a sample surface. High resolution images of dielectric gratings and spheres containing both topographic and dielectric information have been obtained. The resolution obtained is 30 nm in the lateral directions and 0.1 nm in height depending o­n proper tip fabrication.
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