Control of ultrafast laser-induced bulk nanogratings in fused silica via pulse time envelopes

Abstract : Employing a method of in-situ control we propose an approach for the optimization of self-arranged nanogratings in bulk fused silica under the action of ultrashort laser pulses with programmable time envelopes. A parametric study of the influence of the pulse duration and temporal form asymmetries is given. Using the diffraction properties of the laser-triggered subwavelength patterns we monitor and regulate the period and the quality of the periodic nanoscale arrangement via the effective nonlinear excitation dose. Periodicity tuning on tens of nanometers can be achieved by pulse temporal variations, with a minimum around 0.7 ps at the chosen powers. Equally, strong sensitivity to pulse asymmetries is observed. The driving factor is related to increasing carrier densities due to nonlinear confinement and the development of extended nanoroughness domains upon multiple exposure, creating a pulse-dependent effective accumulation dose via a morpho-dimensional effect. The result may impact the associated optical functions.
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Article dans une revue
Optics Express, Optical Society of America, 2012, 20 (12), pp.12997
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Contributeur : Razvan Stoian <>
Soumis le : vendredi 25 mai 2012 - 12:41:06
Dernière modification le : mercredi 25 juillet 2018 - 14:05:30

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  • HAL Id : ujm-00701394, version 1

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Cyril Mauclair, Marian Zamfirescu, Jean-Philippe Colombier, Guanghua Cheng, Konstantin Mishchik, et al.. Control of ultrafast laser-induced bulk nanogratings in fused silica via pulse time envelopes. Optics Express, Optical Society of America, 2012, 20 (12), pp.12997. 〈ujm-00701394〉

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