Photoinduced darkening, crystallization and reversible emission in ZnTe thin films

Kshirsagar, Sachin D.; Shaik, Ummar Pasha; Krishna, M. Ghanashyam; Tewari, Surya P.

doi:10.1007/s00339-012-7300-0

Cited by 3 publications

(1 citation statement)

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“…In their observations, amorphization takes places after the first laser pulse, while crystallization occurs during subsequent pulses. Elemental dissociation of Te has also been reported for ZnTe [21,45]. In our case, as we observe the end product only, we do not know the transformation pathways starting from the initial tellurite glass that ultimately led to the formation of a-Te or t-Te phases as we are observing here.…”

Section: (H))mentioning

confidence: 41%

Direct-write laser-induced self-organization and metallization beyond the focal volume in tellurite glass

Torun,

Kishi,

Bellouard

2021

Preprint

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We 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 elemental tellurium. In addition, we observe that this selforganization 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.

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Section: (H))mentioning

confidence: 41%