Picosecond laser structuration under high pressures: observation of boron nitride nanorods

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dc.creatorMuseur, Luc
dc.creatorPetitet, Jean Pierre
dc.creatorMichel, Jean Pierre
dc.creatorMarine, Wladimir
dc.creatorAnglos, Demetrios
dc.creatorFotakis, Costa
dc.creatorKanaev, Andrei
dc.date2008-11-15
dc.date.accessioned2026-07-07T10:18:42Z
dc.date.available2026-07-07T10:18:42Z
dc.descriptionWe report on picosecond UV-laser processing of hexagonal boron nitride (hBN) at moderately high pressures above 500 bar. The main effect is specific to the ambient gas and laser pulse duration in the ablation regime: when samples are irradiated by 5 ps or 0.45 ps laser pulses in nitrogen gas environment, multiple nucleation of a new crystalline product - BN nanorods - takes place. This process is triggered on structural defects, which number density strongly decreases upon recrystallization. Non-linear photon absorption by adsorbed nitrogen molecules is suggested to mediate the nucleation-growth. High pressure is responsible for the confinement and strong backscattering of ablation products. A strong surface structuring also appears at longer 150-ps laser irradiation in similar experimental conditions. However, the transformed product in this case is amorphous strongly contaminated by boron suboxides BxOy.
dc.identifierhttps://arxiv.org/abs/0811.2500
dc.identifierhttp://arxiv.org/abs/0811.2500
dc.identifierJournal of Applied Physics 104 (2008) 093504
dc.identifierdoi:10.1063/1.3000457
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/174273
dc.subjectMaterials Science
dc.subjectOther Condensed Matter
dc.subjectOptics
dc.titlePicosecond laser structuration under high pressures: observation of boron nitride nanorods
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