EILA-SAX junior research group
Coherent and selective excitation and ablation of organic materials with mid-IR laser radiation
For topic 2 of the NWFG EILA-SAX, a tunable ultra-short pulsed laser source is used, which emits UV to mid-IR laser radiation with pulse durations > 50 fs. In the current junior research group ULTRALAS, mid-IR laser radiation was used to resonantly ablate polymers, for example, and the time-resolved heating and melting of gold was investigated using time-resolved ellipsometry with an in-house development. A mid-IR spectrometer, which allows the temporal pulse shape of ultra-short pulsed mid-IR laser radiation to be formed and thus coherently excite organic substances, has been procured via the funding “Improvements to research infrastructure and research projects with an application-oriented focus (InfraPro)” (application no. 100318365). For this purpose, the laser-induced molecular changes can be recorded in a time-resolved manner with a mid-IR spectrometer. The aim is to selectively excite organic compounds by pulse shaping of mid-IR laser radiation so that, for example, defined active layers can be laser-processed during the processing of organic solar cells.