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Probing nonlinear excitation conditions: photoluminescence and nonlinear absorption studies in laser-irradiated dielectrics.

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Title: Probing nonlinear excitation conditions: photoluminescence and nonlinear absorption studies in laser-irradiated dielectrics.
Authors: Sneftrup, Peter S.1 (AUTHOR), Juergens, Peter2 (AUTHOR), Michele, Vincenzo De2,3 (AUTHOR), Andrade, José R. C.2 (AUTHOR), Vrakking, Marc J. J.2 (AUTHOR), Balling, Peter1 (AUTHOR), Mermillod-Blondin, Alexandre2 (AUTHOR) mermillod@mbi-berlin.de
Source: Applied Physics A: Materials Science & Processing. Mar2024, Vol. 130 Issue 3, p1-8. 8p.
Subjects: Ultrashort laser pulses, Transparent solids, Solid-state plasmas, Microscopy, Photoluminescence, Ultra-short pulsed lasers
Abstract: Understanding the fundamentals of laser-matter interactions is crucial for developing and optimizing ultrafast laser processing strategies. In optically transparent solids, the key event by which energy is deposited in the material is through the generation of an electron–hole plasma via nonlinear excitation mechanisms. As the energy stored in the plasma relaxes, local distortions of the lattice may occur, such as point defects. These defects give rise to new discrete energy states located in the bandgap. In this study, we investigate how the presence of these energy states influences the transmission of ultrashort near-infrared laser pulses in fused silica. Experimental results of laser pulse transmission and photoluminescence from defects are correlated with optical microscopy of the irradiated spots, allowing us to identify different nonlinear interaction regimes. Numerical simulations indicate that photo-induced defects influence the nonlinear losses of ultrashort laser pulses and explain why a non-destructive damage regime with detectable excitation is only observed for a narrow intensity range in multipulse experiments. [ABSTRACT FROM AUTHOR]
Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature 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.)
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  Data: Probing nonlinear excitation conditions: photoluminescence and nonlinear absorption studies in laser-irradiated dielectrics.
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  Data: <searchLink fieldCode="JN" term="%22Applied+Physics+A%3A+Materials+Science+%26+Processing%22">Applied Physics A: Materials Science & Processing</searchLink>. Mar2024, Vol. 130 Issue 3, p1-8. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Ultrashort+laser+pulses%22">Ultrashort laser pulses</searchLink><br /><searchLink fieldCode="DE" term="%22Transparent+solids%22">Transparent solids</searchLink><br /><searchLink fieldCode="DE" term="%22Solid-state+plasmas%22">Solid-state plasmas</searchLink><br /><searchLink fieldCode="DE" term="%22Microscopy%22">Microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Ultra-short+pulsed+lasers%22">Ultra-short pulsed lasers</searchLink>
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  Data: Understanding the fundamentals of laser-matter interactions is crucial for developing and optimizing ultrafast laser processing strategies. In optically transparent solids, the key event by which energy is deposited in the material is through the generation of an electron–hole plasma via nonlinear excitation mechanisms. As the energy stored in the plasma relaxes, local distortions of the lattice may occur, such as point defects. These defects give rise to new discrete energy states located in the bandgap. In this study, we investigate how the presence of these energy states influences the transmission of ultrashort near-infrared laser pulses in fused silica. Experimental results of laser pulse transmission and photoluminescence from defects are correlated with optical microscopy of the irradiated spots, allowing us to identify different nonlinear interaction regimes. Numerical simulations indicate that photo-induced defects influence the nonlinear losses of ultrashort laser pulses and explain why a non-destructive damage regime with detectable excitation is only observed for a narrow intensity range in multipulse experiments. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Applied Physics A: Materials Science & Processing is the property of Springer Nature 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: 10.1007/s00339-024-07311-2
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        Type: general
      – SubjectFull: Transparent solids
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      – SubjectFull: Solid-state plasmas
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      – SubjectFull: Microscopy
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      – SubjectFull: Ultra-short pulsed lasers
        Type: general
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      – TitleFull: Probing nonlinear excitation conditions: photoluminescence and nonlinear absorption studies in laser-irradiated dielectrics.
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              Text: Mar2024
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