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)


In-chip direct laser writing of a centimeter-scale acoustic micromixer

(full pdf)

Jorick van ‘t Oever, Niels Spannenburg, Herman Offerhaus, Dirk van den Ende, Jennifer Herek, Frieder Mugele
Journal of Micro/Nanolithography, MEMS, and MOEMS
14(2), 023503 Apr. 1, 2015

A centimeter-scale micromixer was fabricated by two-photon polymerization inside a closed micro-channel using direct laser writing. The structure consists of a repeating pattern of 20 μm X 20 μm X 155 μm acrylate pillars and extends over 1.2 cm. Using external ultrasonic actuation, the micropillars locally induce streaming with flow speeds of 30 μms-1 . The fabrication method allows for large flexibility and more complex designs.
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