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)


Imaging soft samples in liquid with tuning fork based shear force microscopy

(full pdf)

Rensen WHJ, van Hulst NF, Kammer SB
vol 77 issue 10: p1557-p1559 SEP 4 2000

We present a study of the dynamic behavior of tuning forks and the application of tuning fork based shear force microscopy o­n soft samples in liquid. A shift in resonance frequency and a recovery of the tip vibration amplitude have been observed upon immersion into liquid. Conservation of the vibration mode is confirmed by both direct stroboscopic observation and by detection of the tip vibration amplitude of the tuning fork. Thanks to the partial recovery of the Q factor upon complete immersion into liquid, it is possible to obtain high-resolution images o­n soft samples in liquid. This opens a new domain of applications for tuning fork based near-field scanning optical microscopes. (C) 2000 American Institute of Physics. [S0003- 6951(00)04436-3].
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