Periodic nanoscale structures on polyimide surfaces generated by temporally tailored femtosecond laser pulses.
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.
University of Vienna, Department of Physical Chemistry, Währinger Strasse 42, A-1090 Wien, Austria.
Magdalena
M
Forster
Wolfgang
W
Kautek
Nicolas
N
Faure
Eric
E
Audouard
Razvan
R
Stoian