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.

 

Microfabrication of near-field optical probes


Ruiter AGT, Moers MHP, vanHulst NF, deBoer M
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
vol 14 issue 2: p597-p601 MAR-APR 1996

Near-field optical microscopy generally uses a tapered optical fiber, which is metal coated, to form a sub-wavelength sized light source. Here, a technique for the fabrication of a new type of probe is described. The new design is based o­n atomic force microscope probes and consists of a silicon nitride cantilever with a solid transparent conical tip. The probes are made using micromechanical techniques, which allow batch fabrication of the probes. A near-field scanning optical microscope system was built to test the probes. This system features force detection by a beam deflection technique and subsequent force feedback together with a conventional optical microscope. A major advantage of the apparatus is the ease at which images are obtained. Results o­n a test sample show that an optical resolution of 300 nm can be obtained together with a simultaneous height image. (C) 1996 American Vacuum Society.
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