Ablation-cooled material removal with ultrafast bursts of pulses

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dc.citation.epage88en_US
dc.citation.issueNumber7618en_US
dc.citation.spage84en_US
dc.citation.volumeNumber537en_US
dc.contributor.authorKerse C.en_US
dc.contributor.authorKalaycıoğlu, H.en_US
dc.contributor.authorElahi, P.en_US
dc.contributor.authorÇetin B.en_US
dc.contributor.authorKesim, D. K.en_US
dc.contributor.authorAkçaalan, Ö.en_US
dc.contributor.authorYavaş S.en_US
dc.contributor.authorAşık, M. D.en_US
dc.contributor.authorÖktem B.en_US
dc.contributor.authorHoogland H.en_US
dc.contributor.authorHolzwarth, R.en_US
dc.contributor.authorIlday, F. Ö.en_US
dc.date.accessioned2018-04-12T10:49:43Z
dc.date.available2018-04-12T10:49:43Z
dc.date.issued2016en_US
dc.departmentDepartment of Mechanical Engineeringen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractThe use of femtosecond laser pulses allows precise and thermal-damage-free removal of material (ablation) with wide-ranging scientific, medical and industrial applications. However, its potential is limited by the low speeds at which material can be removed and the complexity of the associated laser technology. The complexity of the laser design arises from the need to overcome the high pulse energy threshold for efficient ablation. However, the use of more powerful lasers to increase the ablation rate results in unwanted effects such as shielding, saturation and collateral damage from heat accumulation at higher laser powers. Here we circumvent this limitation by exploiting ablation cooling, in analogy to a technique routinely used in aerospace engineering. We apply ultrafast successions (bursts) of laser pulses to ablate the target material before the residual heat deposited by previous pulses diffuses away from the processing region. Proof-of-principle experiments on various substrates demonstrate that extremely high repetition rates, which make ablation cooling possible, reduce the laser pulse energies needed for ablation and increase the efficiency of the removal process by an order of magnitude over previously used laser parameters. We also demonstrate the removal of brain tissue at two cubic millimetres per minute and dentine at three cubic millimetres per minute without any thermal damage to the bulk.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T10:49:43Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2016en
dc.identifier.doi10.1038/nature18619en_US
dc.identifier.issn0028-0836
dc.identifier.urihttp://hdl.handle.net/11693/36708
dc.language.isoEnglishen_US
dc.publisherNature Publishing Groupen_US
dc.relation.isversionofhttp://dx.doi.org/10.1038/nature18619en_US
dc.source.titleNatureen_US
dc.titleAblation-cooled material removal with ultrafast bursts of pulsesen_US
dc.typeArticleen_US

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