Response of graphene to femtosecond high-intensity laser irradiation

2011/05/05 by Adam Roberts, Daniel Cormode, Collin Reynolds +3 · 1 citation
Physics and Astronomy · #cond-mat.mtrl-sci #physics.optics

paper · pdf · doi:10.1063/1.3623760

published as Appl. Phys. Lett. 99, 051912 (2011) · 4 pages, 3 figures

arxiv created 2011/05/05 · arxiv updated 2012/01/09

Abstract

We study the response of graphene to high-intensity 10¹1-10¹2 Wcm^-2, 50-femtosecond laser pulse excitation. We establish that graphene has a fairly high (~3×10¹2Wcm^-2) single-shot damage threshold. Above this threshold, a single laser pulse cleanly ablates graphene, leaving microscopically defined edges. Below this threshold, we observe laser-induced defect formation that leads to degradation of the lattice over multiple exposures. We identify the lattice modification processes through in-situ Raman microscopy. The effective lifetime of CVD graphene under femtosecond near-IR irradiation and its dependence on laser intensity is determined. These results also define the limits of non-linear applications of graphene in femtosecond high-intensity regime.

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