Pump-probe microscopy of femtosecond laser ablation in air and liquids

Kanitz, Alexander; Förster, Daniel J.; Hoppius, Jan S.; Weber, Rudolf; Ostendorf, Andreas; Gurevich, Evgeny L.

doi:10.1016/j.apsusc.2018.12.184

Cited by 17 publications

(15 citation statements)

References 53 publications

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“…However, photomechanical spallation is only observed for ultrashort pulse durations 33 , while in the case of ns-LAL material is ejected in the form of a discontinuous gas-liquid mixture. Simulations predict that this gas-liquid mixture starts expanding significantly above the sample surface when delay times of approximately 2 ns are exceeded 35 . Following this, the remaining loss mechanisms for the 7 ns pulse are plume, vapor and cavitation bubble shielding, while the ablation process should proceed unperturbed for the 1 ns pulse.…”

Section: Discussionmentioning

confidence: 98%

“…However, this may be attributed to the higher amount of laser energy, reaching the target for ablation in air since filamentation occurred in water. Furthermore, it was shown that the ablation mechanisms and dynamics of ultrashort LAL differ significantly from those during ns-LAL as the conditions for thermal and stress confinement are no longer fulfilled for ns-LAL 35 . Thus, the difference between the ablation dynamics reported for 500 fs pump-pulses in reference 36 and the results presented here with a pump-pulse duration of 650 ps may be attributed to different ablation mechanisms due to variation of the pulse duration.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Time resolved studies reveal the origin of the unparalleled high efficiency of one nanosecond laser ablation in liquids

Dittrich¹,

Spellauge²,

Barcikowski³

et al. 2022

OEA

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Laser ablation in liquid is a scalable nanoparticle production method with applications in areas like catalysis and biomedicine. Due to laser-liquid interactions, different energy dissipation channels such as absorption by the liquid and scattering at the ablation plume and cavitation bubble lead to reduced laser energy available for nanoparticle production. Ultrashort pulse durations cause unwanted nonlinear effects in the liquid, and for ns pulses, intra-pulse energy deposition attenuation effects are to be expected. However, intermediate pulse durations ranging from hundreds of picoseconds up to one nanosecond have rarely been studied in particular in single-pulse settings. In this study, we explore the pico-to nanosecond pulse duration regimes to find the pulse duration with the highest ablation efficiency. We find that pulse durations around 1 -2 ns enable the most efficient laser ablation in liquid since the laser beam shielding by the ablation plume and cavitation bubble sets in only at longer pulse durations. Furthermore, pump-probe microscopy imaging reveals that the plume dynamics in liquids start to differ from plume dynamics in air at about 2 ns after pulse impact.

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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Time resolved studies reveal the origin of the unparalleled high efficiency of one nanosecond laser ablation in liquids

Dittrich¹,

Spellauge²,

Barcikowski³

et al. 2022

OEA

View full text Add to dashboard Cite

show abstract

“…show that the ablation process in air and liquid is similar in the first 10 ps of laser ablation; however, after 10 ps, there is a significant difference from the ablation process usually observed in air. 41 Reproduced with permission. 37 Copyright 2020, Elsevier…”

Section: Dynamics In Ultra-short Laser Processingmentioning

confidence: 99%

Ultrafast imaging for uncovering laser–material interaction dynamics

Wang

Wei

Yuan

et al. 2022

Int Journal of Mech Sys Dyn

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The physical mechanism of the dynamics in laser–material interaction has been an important research area. In addition to theoretical analysis, direct imaging‐based observation of ultrafast dynamic processes is an important approach to understand many fundamental issues in laser–material interaction such as inertial confinement fusion (ICF), laser accelerator construction, and advanced laser production. In this review, the principles and applications of three types of commonly used ultrafast imaging methods are introduced, including the pump–probe, X‐ray diagnosis, and single‐shot optical burst imaging. We focus on the technical features such as the spatial and temporal resolution for each technique, and present several conventional applications.

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“…Real-time monitoring and in situ diagnosis of light excitation and absorption around light-illustrated area during the ultrashort pulse laser micro-/nanoprocessing is very useful for investigating the dynamic evolution and underlying mechanism of ultrafast laser-material nonlinear interaction under various conditions and promoting the precision, quality and even throughput of ultrashort pulse laser manufacturing. Pump-probe microscopy is one of representative transient imaging methods for this purpose (Sakakura et al 2011;Grossmann et al 2016;Kumkar et al 2018;Jenne et al 2018;Kalupka et al 2017;Kanitz et al 2019). Time-resolved observation of dynamic evolution of laser induced in situ ablation on surface and in bulk of materials, formation, and evolution of transition stress/pressure waves and their spatial distributions have been extensively investigated using this technique.…”

Section: Basic Setup Of Transient Imaging Systems For Ultrashort Pulsmentioning

confidence: 99%

Basic Optics and Diagnostics Apparatus for Ultrashort Pulse Laser Micro-/Nanoprocessing

Xu¹,

Cheng²,

Sugioka³

2020

Handbook of Laser Micro- And Nano-Engineering

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With a significantly improved processing precision, quality, and flexibility in 3D space, ultrashort pulse laser processing at the micro-and nanoscales has exhibited superior performances in the fields of fundamental research and industrial manufacturing as compared with traditional long-pulse and continuous laser processing in the past decades. In this chapter, basic optics for ultrashort pulse laser micro-/nanoprocessing are introduced. Specifically, basic optical setups of two representative processing systems (3D ultrashort laser direct writing systems and laser parallel processing systems) are described as well as their crucial optical components. Recent advances of ultrashort laser micro-/nanoprocessing such as spatiotemporal beam shaping and homogenization of femtosecond laser pulses are presented. Moreover, typical diagnosis systems for ultrashort pulse laser processing such as basic optical setups for measurement of pulse durations and transient pump-probe imaging are briefly summarized.

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Pump-probe microscopy of femtosecond laser ablation in air and liquids

Cited by 17 publications

References 53 publications

Time resolved studies reveal the origin of the unparalleled high efficiency of one nanosecond laser ablation in liquids

Time resolved studies reveal the origin of the unparalleled high efficiency of one nanosecond laser ablation in liquids

Ultrafast imaging for uncovering laser–material interaction dynamics

Basic Optics and Diagnostics Apparatus for Ultrashort Pulse Laser Micro-/Nanoprocessing

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