Issue
EPL
Volume 83, Number 3, August 2008
Article Number 38003
Number of page(s) 6
Section Interdisciplinary Physics and Related Areas of Science and Technology
DOI http://dx.doi.org/10.1209/0295-5075/83/38003
Published online 23 July 2008
EPL, 83 (2008) 38003
DOI: 10.1209/0295-5075/83/38003

Triazene photopolymer dynamic release layer-assisted femtosecond laser-induced forward transfer with an active carrier substrate

D. 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

dpb@orc.soton.ac.uk

received 18 March 2008; accepted in final form 13 June 2008; published August 2008
published online 23 July 2008

Abstract
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 $\approx$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.

PACS
81.15.Fg - Laser deposition.
64.70.km - Polymers.
42.65.Ky - Frequency conversion; harmonic generation, including higher-order harmonic generation.

© EPLA 2008