Controlling energy coupling and particle ejection from aluminum surfaces irradiated with ultrashort laser pulses - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Surface Science Année : 2009

Controlling energy coupling and particle ejection from aluminum surfaces irradiated with ultrashort laser pulses

Résumé

Hydrodynamic simulations are used to evaluate the potential of ultrashort laser pulses to localize energy at metallic surfaces, in our case aluminum. The emphasis is put on the dynamic sequence of laser energy deposition steps during the electron–ion nonequilibrium stage and the subsequent matter transformation phases. The simulations indicate correlated optical and thermodynamical states associated to specific electronic collisional mechanisms. The timescales of energy deposition deliver a guideline for using relevant relaxation times to improve the energy coupling into the material. We focus on a class of pump-probe experiments which investigate energy storage and particle emission from solids under ultrafast laser irradiation. Moreover, we have used our model to explain the experimentally observed optimization of energy coupling by tailoring temporal laser intensity envelopes and its subsequent influence on the ablation rate and on the composition of ablation products. Potential control for nanoparticle generation is discussed.

Dates et versions

hal-00411779 , version 1 (28-08-2009)

Identifiants

Citer

Jean-Philippe Colombier, Eric Audouard, Patrick Combis, Arkadi Rosenfeld, Ingolf-Volker Hertel, et al.. Controlling energy coupling and particle ejection from aluminum surfaces irradiated with ultrashort laser pulses. Applied Surface Science, 2009, pp.APSUSC-18537. ⟨10.1016/j.apsusc.2009.04.081⟩. ⟨hal-00411779⟩
45 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More