Dipl. Phys. Bastian Zielinski

▶ Laser-induced periodic surface structures and cell surgery
Address Universität Kassel
Fachbereich 10
Institut für Physik
Experimentalphysik III
Heinrich-Plett-Straße 40
34132 Kassel
Building: AVZ I
Room 1134
Telephone +49 561 804-4495
Telefax +49 561 804-4453
Office Hours:

Vorzugsweise Montags

Current research topic in Team Materialprocessing:

Laser-induced periodic surface structures (LIPSS)

REM imaging of LIPSS on glas.

LIPSS (laser-induced periodic surface structures) are periodic structures in the range of the laser wavelength or smaller, which can be used for a variety of applications. For example optical gratings in the form of surface structuring or modification of refractive index within the bulk material. But, LIPPS on a surface also change properties like friction. So arise, among other things, opportunities for biofunctionalization (influencing cell growth).

The formation of LIPSS depends on many parameters, such as energy, number and polarization of the laser pulses. But (even 50 years after their discovery) the causes of these dependencies are not yet sufficiently explained yet or there is no universal and accepted model.

With our existing experimental setup we can investigate many parameter-sets on a variety of materials in a short time; up to temporal and polarization shaping of ultrashort laser pulses. The goal is to uncover previously unknown relationships.

Cell surgery

With focused ultrashort laser pulses it is possible to manipulate or destroy a single cell or the components of a cell, such as the cell membrane. The infrared laser only works in a volume the size of a micrometer, without influencing surrounding cells and tissue.
In research, for example, the membrane of a cell can be made permeable for a short time so that markers or genetic material can penetrate for genetic manipulation. It is also possible to destroy entire cells or cell parts and observe the subsequent wound healing processes, for example during the development of a fly embryo.