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Plasma dynamics and structural modifications induced by femtosecond laser pulses in quartz

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Title: Plasma dynamics and structural modifications induced by femtosecond laser pulses in quartz
Authors: Hernandez-Rueda, J.1 javihr@io.cfmac.csic.es, Puerto, D.1,2, Siegel, J.1, Galvan-Sosa, M.1, Solis, J.1
Source: Applied Surface Science. Sep2012, Vol. 258 Issue 23, p9389-9393. 5p.
Subjects: Plasma dynamics, Molecular structure, Femtosecond lasers, Quartz crystals, Relaxation phenomena, Free electron lasers, Graph theory
Abstract: Abstract: We have investigated plasma formation and relaxation dynamics induced by single femtosecond laser pulses at the surface of crystalline SiO2 (quartz) along with the corresponding topography modifications. The use of fs-resolved pump-probe microscopy allows combining spatial and temporal resolution and simultaneous access to phenomena occurring in adjacent regions excited with different local fluences. The results show the formation of a transient free-electron plasma ring surrounding the location of the inner ablation crater. Optical microscopy measurements reveal a 30% reflectivity decrease in this region, consistent with local amorphization. The accompanying weak depression of ≈15nm in this region is explained by gentle material removal via Coulomb explosion. Finally, we discuss the timescales of the plasma dynamics and its role in the modifications produced, by comparing the results with previous studies obtained in amorphous SiO2 (fused silica). For this purpose, we have conceived a new representation concept of time-resolved microscopy image stacks in a single graph, which allows visualizing quickly suble differences of the overall similar dynamic response of both materials. [Copyright &y& Elsevier]
Copyright of Applied Surface Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 78278227
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Plasma dynamics and structural modifications induced by femtosecond laser pulses in quartz
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  Data: <searchLink fieldCode="AR" term="%22Hernandez-Rueda%2C+J%2E%22">Hernandez-Rueda, J.</searchLink><relatesTo>1</relatesTo><i> javihr@io.cfmac.csic.es</i><br /><searchLink fieldCode="AR" term="%22Puerto%2C+D%2E%22">Puerto, D.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Siegel%2C+J%2E%22">Siegel, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Galvan-Sosa%2C+M%2E%22">Galvan-Sosa, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Solis%2C+J%2E%22">Solis, J.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Applied+Surface+Science%22">Applied Surface Science</searchLink>. Sep2012, Vol. 258 Issue 23, p9389-9393. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Plasma+dynamics%22">Plasma dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+structure%22">Molecular structure</searchLink><br /><searchLink fieldCode="DE" term="%22Femtosecond+lasers%22">Femtosecond lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Quartz+crystals%22">Quartz crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Relaxation+phenomena%22">Relaxation phenomena</searchLink><br /><searchLink fieldCode="DE" term="%22Free+electron+lasers%22">Free electron lasers</searchLink><br /><searchLink fieldCode="DE" term="%22Graph+theory%22">Graph theory</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: We have investigated plasma formation and relaxation dynamics induced by single femtosecond laser pulses at the surface of crystalline SiO2 (quartz) along with the corresponding topography modifications. The use of fs-resolved pump-probe microscopy allows combining spatial and temporal resolution and simultaneous access to phenomena occurring in adjacent regions excited with different local fluences. The results show the formation of a transient free-electron plasma ring surrounding the location of the inner ablation crater. Optical microscopy measurements reveal a 30% reflectivity decrease in this region, consistent with local amorphization. The accompanying weak depression of ≈15nm in this region is explained by gentle material removal via Coulomb explosion. Finally, we discuss the timescales of the plasma dynamics and its role in the modifications produced, by comparing the results with previous studies obtained in amorphous SiO2 (fused silica). For this purpose, we have conceived a new representation concept of time-resolved microscopy image stacks in a single graph, which allows visualizing quickly suble differences of the overall similar dynamic response of both materials. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Applied Surface Science is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.apsusc.2011.12.020
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        Text: English
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        Type: general
      – SubjectFull: Molecular structure
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      – SubjectFull: Femtosecond lasers
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      – SubjectFull: Quartz crystals
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      – SubjectFull: Relaxation phenomena
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      – SubjectFull: Graph theory
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      – TitleFull: Plasma dynamics and structural modifications induced by femtosecond laser pulses in quartz
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              Text: Sep2012
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