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Periodic nanoscale structures on polyimide surfaces generated by temporally tailored femtosecond laser pulses
Magdalena Forster1, Wolfgang Kautek, Nicolas Faure
1University of Vienna, Department of Physical Chemistry, Währinger Strasse 42, A-1090 Wien, Austria.
Physical Chemistry Chemical Physics : PCCP
|January 18, 2011
Abstract:
A strong influence of different pulse durations and double pulse delay times on the formation of periodic surface structures on polyimide were observed employing ultrashort laser pulses tailored on a sub-picosecond and picosecond time scale. Multi-photon, defect-related excitation mechanisms and thermal expansion of the polymer lattice correlated to a loss of long range order and polarisation memory were considered.
