Micro-nano-structuring

 

Method

With a USP laser induced single nanoantenna on a gold layer. Copyright: Chair for Laser Technology LLT With a USP laser induced single nanoantenna on a gold layer.

The short interaction time between USP-laser radiation and the workpiece leads to an extreme thermodynamic nonequilibrium. As a consequence, metallic properties or strong thermal stresses can be induced in semiconductors or dielectrics. The relaxation of these transient states may cause formation dynamics of micro- and nanostructures with feature sizes below the optical diffraction limit. The analysis of the formation dynamics and the production of tailor-made structures constitute the research priorities.

 

Applications

On silicon with USP-laser radiation-induced self-assembled periodic surface structures, so-called ripples. Copyright: Chair for Laser Technology LLT On silicon with USP-laser radiation-induced self-assembled periodic surface structures, so-called ripples.

Potential applications of these structures can be found for example in the field of surface functionalization. In this context, tailored surfaces can be applied to manipulate the adhesive properties of a surface. In this way, self-cleaning or friction-optimized surfaces can be produced.

Futhermore, the optical characteristics of a solid can be manipulated by the surface conditions. This enables potential applications in plasmonics, sensor technology or photovoltaics.

Metallic, standing antennas can be applied as electrical contacts in micro-electronics as well as for sensor applications.

 

Main topics

The following links provide some topics of the group ultrashort pulse processing at LLT in the field of micro- nano structuring:

Deposition of graphene

Generation of nano antennas

Fabrication of nanostructures for near field optical applications

 

Links

Micro structuring at Fraunhofer ILT

Nano structuring at Fraunhofer ILT

DFG priority program 1327

 

Annual Reports

Nano antennas

Laser induced nano structuring for near field optical applications

Micro structuring of metallic glass

Surface functionalization