Torun, GözdenKishi, TetsuoBellouard, Yves2021-05-142021-05-142021-05-142021-05-1410.1103/PhysRevMaterials.5.055201https://infoscience.epfl.ch/handle/20.500.14299/178022We report on a self-organized process initiated on a potassium-tungsten-tellurite glass surface under repetitive femtosecond laser irradiation in a regime where cumulative effects lead to a localized melting. Specifically, we show that self-organized periodic patterns consisting of parallel nanoplanes perpendicular to the laser polarization are forming and extending beyond the zone under direct laser exposure. Examination of the modified regions revealed a phase change from a glassy tellurium-oxide to a crystalline tellurium. In addition, we observe that this self-organization process, associated with elemental redistribution and deoxygenation, is triggered by the optical-field strength. We suggest that early self-organized nanostructures formed by a local-field enhancement is subsequently reinforced by a metallization event in an open-air atmosphere.Femtosecond laser irradiationSelf auto-organizationCrystallizationPhotoinduced effectDielectricsRaman spectroscopytext::journal::journal article::research article