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Damage effects on multi-layer graphene from femtosecond laser interaction

We present a study on the damage effects of femtosecond laser interaction on exfoliated multi-layer graphene using the techniques of optical microscopy, atomic force microscopy, and Raman spectroscopy. Various effects of the interaction were observed. The ablation threshold was found to be ∼4 mJ cm−2, and was slightly higher in transmission mode than in reflection mode. This work also demonstrates the feasibility of ultrafast laser patterning of exfoliated multi-layer graphene.