6533b870fe1ef96bd12cf0e8
RESEARCH PRODUCT
Deviation from threshold model in ultrafast laser ablation of graphene at sub-micron scale
Luca FurfaroA. Gil-villalbaRoland SalutRemo GiustChen XieJohn M. DudleyPierre-ambroise LacourtFrançois CourvoisierMaxime Jacquotsubject
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]Materials scienceLaser ablationPhysics and Astronomy (miscellaneous)Graphenebusiness.industryScanning electron microscopemedicine.medical_treatmentAnalytical chemistryAblationLaserlaw.inventionSurface coatingOpticsImpact craterlawmedicinebusinessUltrashort pulsedescription
International audience; We investigate a method to measure ultrafast laser ablation threshold with respect to spot size. We use structured complex beams to generate a pattern of craters in CVD graphene with a single laser pulse. A direct comparison between beam profile and SEM characterization allows us to determine the dependence of ablation probability on spot-size, for crater diameters ranging between 700 nm and 2.5 μm. We report a drastic decrease of ablation probability when the crater diameter is below 1 μm which we interpret in terms of free-carrier diffusion.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-06-21 |