Triazene photopolymer dynamic release layer-assisted femtosecond laser-induced forward transfer with an active carrier substrateD. P. Banks1, K. Kaur1, R. Gazia1, R. Fardel2, 3, M. Nagel2, T. Lippert3 and R. W. Eason1
1 Optoelectronics Research Centre, University of Southampton - Southampton SO17 1BJ, UK, EU
2 General Energy Research Department, Paul Scherrer Institut - 5232 Villigen PSI, Switzerland
3 EMPA, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Functional Polymers Überlandstrasse 129, 8600 Dübendorf, Switzerland
received 18 March 2008; accepted in final form 13 June 2008; published August 2008
published online 23 July 2008
Discs of solid material have been forward transferred from thin films on transparent carrier substrates using femtosecond Ti:sapphire laser-induced forward transfer (fs-LIFT) with a triazene polymer dynamic release layer (DRL). The fluence threshold for fs-LIFT was found to be only 20% of the DRL ablation threshold at the laser wavelength. This decrease is attributed to ultrafast shock-wave generation in the constrained polymer layer under femtosecond irradiation being the driving force for fs-LIFT with the polymer DRL. The result is very different from the nanosecond regime, where the LIFT threshold is observed to be slightly above the polymer ablation threshold. White-light continuum generation in a carrier substrate is observed and its influence on the fs-LIFT process is discussed.
81.15.Fg - Laser deposition.
64.70.km - Polymers.
42.65.Ky - Frequency conversion; harmonic generation, including higher-order harmonic generation.
© EPLA 2008