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.


Near-field optical microscopy based on microfabricated probes

Eckert R, Freyland JM, Gersen H, Heinzelmann H, Schurmann G
vol 202: p7-p11 part 1 APR 2001

We demonstrate high resolution imaging with microfabricated, cantilevered probes, consisting of solid quartz tips o­n silicon levers. The tips are covered by a 60-nm thick layer of aluminium, which appears to be closed at the apex when investigated by transmission electron microscopy. An instrument specifically built for cantilever probes was used to record images of latex bead projection patterns in transmission as well as single molecule fluorescence. All images were recorded in constant height mode and show optical resolutions down to 32 nm.
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