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Femtosecond laser-induced nanostructure formation in Sb2Te3

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8 Author(s)
Li, Yuwei ; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA ; Stoica, Vladimir A. ; Endicott, Lynn ; Wang, Guoyu
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We report femtosecond laser-induced nanotracks in highly absorbing Sb2Te3. Groups of nanotracks are observed with widths ∼50 nm and periodicity ∼130 nm, their area of coverage extending with the increase of laser fluence. We demonstrate that under a narrow range of laser fluences and laser irradiation times, long highly aligned nanotracks can be formed in Sb2Te3. The results suggest a promising avenue for laser nanostructuring of chalcogenide thermoelectrics, with implications for high efficiency thermoelectric energy conversion.

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Applied Physics Letters  (Volume:99 ,  Issue: 12 )