We report a correlative imaging analysis of a crystalline silicon target after irradiation with a low number of 1055 nm, similar to 850 fs laser pulses with several microscopy techniques (e.g., scanning electron microscopy, atomic force microscopy, Raman micro-imaging and confocal optical microscopy). The analysis is carried out on samples irradiated both in high vacuum and at atmospheric pressure conditions, evidencing interesting differences induced by the ambient environment. In high-vacuum conditions, the results evidence the formation of a halo, which is constituted by alternate stripes of amorphous and crystalline silicon, around the nascent ablation crater. In air, such an effect is drastically reduced, due to the significant back-deposition of nanoparticulate material induced by the larger ambient pressure.

Multi-imaging analysis of nascent surface structures generated during femtosecond laser irradiation of silicon in high vacuum / Gesuele, F; Nivas, Jj; Fittipaldi, R; Altucci, C; Bruzzese, R; Maddalena, P; Amoruso, S. - In: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING. - ISSN 0947-8396. - 124:2(2018). [10.1007/s00339-018-1633-2]

Multi-imaging analysis of nascent surface structures generated during femtosecond laser irradiation of silicon in high vacuum

Gesuele, F;Nivas, JJ;Altucci, C;Bruzzese, R;Maddalena, P;Amoruso, S
2018

Abstract

We report a correlative imaging analysis of a crystalline silicon target after irradiation with a low number of 1055 nm, similar to 850 fs laser pulses with several microscopy techniques (e.g., scanning electron microscopy, atomic force microscopy, Raman micro-imaging and confocal optical microscopy). The analysis is carried out on samples irradiated both in high vacuum and at atmospheric pressure conditions, evidencing interesting differences induced by the ambient environment. In high-vacuum conditions, the results evidence the formation of a halo, which is constituted by alternate stripes of amorphous and crystalline silicon, around the nascent ablation crater. In air, such an effect is drastically reduced, due to the significant back-deposition of nanoparticulate material induced by the larger ambient pressure.
2018
Multi-imaging analysis of nascent surface structures generated during femtosecond laser irradiation of silicon in high vacuum / Gesuele, F; Nivas, Jj; Fittipaldi, R; Altucci, C; Bruzzese, R; Maddalena, P; Amoruso, S. - In: APPLIED PHYSICS. A, MATERIALS SCIENCE & PROCESSING. - ISSN 0947-8396. - 124:2(2018). [10.1007/s00339-018-1633-2]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/702208
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