Optical Sciences

Biomolecules and nanostructures

The Optical Sciences group studies the interaction of light and matter at the nanoscale. We do this by exploring ways to shape light and its environment. It's what we call active and passive control. Our current focus is on the interaction of light with biomolecules and nanostructures. We are part of Twente University's Department of Science and Technology and member of the MESA+ institute.
We participate in the EU-COST actions MP1102: Coherent Raman microscopy (MicroCor) and CM1202: Supramolecular photocatalytic water splitting (PERSPECT-H2O)


Controlling the quality factor of a tuning-fork resonance between 9 and 300 K for scanning-probe microscopy

(full pdf)

G. Ctistis, E.H. Frater, S.R. Huisman, J.P. Korterik, J.L. Herek, W.L. Vos and P.W.H. Pinkse
Journal of Physics D: Applied Physics
vol 44 issue 37 p375502 sept 21, 2011

We study the dynamic response of a mechanical quartz tuning fork in the temperature range from 9 to 300 K. Since the quality factor Q of the resonance strongly depends on temperature, we implement a procedure to control the quality factor of the resonance. We show that we are able to dynamically change the quality factor and keep it constant over the whole temperature range. This procedure is suitable for applications in scanning-probe microscopy.
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