Femtosecond laser ablation ICP-MS

Russo, Richard E.; Mao, Xianglei; González, Jhanis; Mao, Samuel S.

doi:10.1039/b202044k

Cited by 218 publications

(171 citation statements)

References 21 publications

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“…These include pulsed laser deposition of high criticaltemperature superconductor films 1,2 , femtosecond laser micro-machining and structural modification of dielectrics 3,4 , ultrafast laser-assisted material and chemical analysis 5,6 , and ultrashort X-ray pulse generation 7,8 . However, high power, short pulse laser ablation is still largely unexplored at the fundamental level.…”

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confidence: 99%

Imaging femtosecond laser-induced electronic excitation in glass

Mao

Russo

2003

Applied Physics Letters

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While substantial progress has been achieved in understanding laser ablation on the nanosecond and picosecond time scales, it remains a considerable challenge to elucidate the underlying mechanisms during femtosecond laser material interactions. We present experimental observations of electronic excitation inside wide band-gap silica glass during single femtosecond laser pulse (100 fs, 800 nm) irradiation. Using a femtosecond time-resolved imaging technique, we measured the evolution of a laserinduced electronic plasma inside the silica glass and calculated the electron number density to be on the order of 10 19 cm -3 . 2Pulsed laser ablation has been demonstrated to be a viable technology for an increasing number of applications. These include pulsed laser deposition of high criticaltemperature superconductor films 1,2 , femtosecond laser micro-machining and structural modification of dielectrics 3,4 , ultrafast laser-assisted material and chemical analysis 5,6 , and ultrashort X-ray pulse generation 7,8 . However, high power, short pulse laser ablation is still largely unexplored at the fundamental level.Mechanisms underlying laser ablation processes are quite complex, most previous investigations have focused on laser ablation at relatively long (e.g., nanosecond and picosecond) time scales 9,10 . Since the femtosecond time scale is much shorter than the electron-lattice energy relaxation time, thermal equilibrium cannot be established during the time the laser interacts with a solid material. The absence of a quantitative model at least in part contributes to the lack of understanding of femtosecond laser ablation.Systematic time-resolved measurements can help establish a predictive theory for laser ablation on the femtosecond time scale. In this study, we aim to elucidate some of the characteristics resulting from femtosecond laser interactions with a transparent solid. A detailed examination is presented of the development of laser-induced electronic exciation inside silica glass on the femtosecond time scale. An electronic plasma generated by a 100 fs, 800 nm laser incident in the silica glass was measured.Laser ablation experiments were performed using a femtosecond time-resolved pump-probe setup to image the plasma. Details of the experimental setup will be published elsewhere. Briefly, a Spectra-Physics TSA high power femtosecond laser at its 3 fundamental wavelength (800 nm) was used as the pump beam, which has a pulse duration of approximately 100 femtosecond (FWHM) and energy output up to 25 mJ per pulse. The 800 nm laser beam was focused to a spot size of 50 µm in diameter onto a silica glass sample using an f = 15 cm focal-length lens. After a beam splitter, one arm of the 800 nm output passes an optical delay stage and a KDP crystal, forming a probe beam at 400 nm that is perpendicular to the ablation laser beam. By moving the delay stage on an optical rail, the optical path of the probe beam can be varied, so the time difference between the ablation beam and the probe beam is changed. In...

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confidence: 99%

Imaging femtosecond laser-induced electronic excitation in glass

Mao

Russo

2003

Applied Physics Letters

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“…Shorter pulse width (femtosecond lasers) can help to overcome laser-induced elemental fractionation (36), especially for the analysis of metal samples. Some of the particle-related problems, however, might remain (37). The laser-sample interaction is not the only source of elemental fractionation because particle-size-related processes inside the ICP also contribute to this effect.…”

Section: Lasers and Icpsmentioning

confidence: 99%

Peer Reviewed: Laser Ablation-ICPMS

Hattendorf¹,

Latkoczy²,

Günther³

2003

Anal. Chem.

138

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“…Here, thermal ablation of the contamination layer is likely to be the governing cleaning mechanism, which is, however, accompanied by thermal stresses and structural modifications of the metal. Molten material remains on the target surface, roughens it, and suppresses the TNSA [21]. Furthermore, the long pulse interacts with a plasma consisting of the ablated material.…”

Section: Introductionmentioning

confidence: 99%

Influence of fs-laser desorption on target normal sheath accelerated ions

Hoffmeister

Bellei

Harres

et al. 2013

Phys. Rev. ST Accel. Beams

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We report on the effects of fs-laser desorption on the ion acceleration induced by the target normal sheath acceleration (TNSA) mechanism. The experiment was performed at the Lawrence Livermore National Laboratory (LLNL) using the 100 TW Callisto laser of the Jupiter Laser Facility (JLF). Thin metal foils (Au, Cu, and Al) with thicknesses ranging from 10 to 20 m were irradiated by a variable number of low intensity ($ 10 12 W=cm 2 ) laser pulses, the last one arriving 100 ms before the main pulse. With these short pulses water vapor and hydrocarbon contaminations could stepwise be removed from the target surface. Substantial modifications of the TNSA-ion energy spectra were observed such as diminished proton energy and intensity, the absence of low-charged ion states, increased particle numbers for C 4þ and O 6þ ions in the higher energetic part of their particle spectra as well as the acceleration of target ions. The controlled application of fs-laser desorption on the laser-ion acceleration thus strongly influences the ion spectra and offers the possibility of selecting a targeted range of ion species for the acceleration to higher energies due to the systematic removal of contamination layers.

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Femtosecond laser ablation ICP-MS

Cited by 218 publications

References 21 publications

Imaging femtosecond laser-induced electronic excitation in glass

Imaging femtosecond laser-induced electronic excitation in glass

Peer Reviewed: Laser Ablation-ICPMS

Influence of fs-laser desorption on target normal sheath accelerated ions

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