Optical emission studies of plasma induced by single and double femtosecond laser pulses

Piñón, Victor; Anglos, Demetrios

doi:10.1016/j.sab.2009.07.036

Cited by 61 publications

(46 citation statements)

References 41 publications

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“…With 50 fs pulses, the total plasma intensity with double pulses of 20 µJ (220 µJ) was 100 times higher than the one with a single pulse of the same pulse energy (120 µJ), and 50 times higher than the one with a single pulse but with a doubled pulse energy (140 µJ). Our observations on ultrashort double pulse ablation have been confirmed in similar studies in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionsupporting

confidence: 86%

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Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Semerok¹,

Dutouquet²

2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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To cite this version:A. Semerok, Christophe Dutouquet. Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet : A comparative study. Spectrochimica Acta Part B: Atomic Spectroscopy, Elsevier, 2014Elsevier, , 99, pp.163-171. 10.1016Elsevier, /j.sab.2014 A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT Abstract.Ultrashort pulse laser microablation coupled with optical emission spectroscopy was under study to obtain several micro-LIBS analytical features (shot-to-shot reproducibility, spectral line intensity and lifetime, calibration curves, detection limits). Laser microablation of Al matrix samples with known Cu-and Mg-concentrations was performed by single and double pulses of 50 fs and 1 ps pulse duration in air and with Ar-jet.The micro-LIBS analytical features obtained under different experimental conditions were characterized and compared. The highest shot-to-shot reproducibility and gain in plasma spectral line intensity were obtained with double pulses with Ar-jet for both 50 fs and 1 ps pulse durations. The best calibration curves were obtained with 1ps pulse duration with Ar-jet. Micro-LIBS with ultrashort double pulses may find its effective application for surface elemental microcartography.

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Section: Introductionsupporting

confidence: 86%

“…The analysis of our results and those obtained in [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] has revealed the fundamental role of the electron-lattice relaxation time ( el .  1-10 ps) for laser ablation regime and the resulting double pulse LIBS-features.…”

Section: Discussionmentioning

confidence: 57%

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Semerok¹,

Dutouquet²

2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…15 However, the wavelength of excitation is expected to play a lesser role in ULIBS due to significantly shorter duration of the pulse compared to electron-to-ion energy transfer and heat conduction times which are typically a few ps. 6 Recent results employing fs DP-LA showed very promising results in the fields of LIBS 16 and material modification. 17 In this letter, we report that the signal enhancements in DP ULIBS are highly dependent on the upper excitation energy levels of the emission lines and is strongly influenced by electron-ion relaxation time.…”

mentioning

confidence: 99%

Electron-ion relaxation time dependent signal enhancement in ultrafast double-pulse laser-induced breakdown spectroscopy

Harilal

Diwakar

Hassanein

2013

Applied Physics Letters

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We investigated the emission properties of collinear double-pulse compared to single-pulse ultrafast laser induced breakdown spectroscopy. Our results showed that the significant signal enhancement noticed in the double pulse scheme is strongly correlated to the characteristic electron-ion relaxation time and hence to the inter-pulse delays. Spectroscopic excitation temperature analysis showed that the improvement in signal enhancement is caused by the delayed pulse efficient reheating of the pre-plume. The signal enhancement is also found to be related to the upper excitation energy of the selected lines, i.e., more enhancement noticed for lines originating from higher excitation energy levels, indicating reheating is the major mechanism behind the signal improvement.

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“…This behavior is in good agreement with previous results. 7,9,10 The ER of Al is always slightly higher than that of Ag, but the difference is generally smaller at higher fluences.…”

Section: Resultsmentioning

confidence: 96%

The role of plasma shielding in collinear double-pulse femtosecond laser-induced breakdown spectroscopy

Penczak

Kupfer

Bar

et al. 2014

Spectrochimica Acta Part B: Atomic Spectroscopy

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It is well known that optical emission produced by femtosecond laser-induced breakdown on a surface may be enhanced by using a pair of laser pulses separated by a suitable delay. Here we elucidate the mechanism for this effect both experimentally and theoretically. Using a bilayer sample consisting of a thin film of Ag deposited on an Al substrate as the ablation target and measuring the breakdown spectrum as a function of fluence and pulse delay, it is shown experimentally that the enhanced signal is not caused by additional ablation initiated by the second pulse. Rather, particle-in-cell calculations show that the plasma produced by the first pulse shields the surface from the second pulse for delays up to 100 ps. These results indicate that the enhancement is the result of excitement of particles entrained in the plasma produced by the first pulse.

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Optical emission studies of plasma induced by single and double femtosecond laser pulses

Cited by 61 publications

References 41 publications

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Analytical performances of laser-induced micro-plasma of Al samples with single and double ultrashort pulses in air and with Ar-jet: A comparative study

Electron-ion relaxation time dependent signal enhancement in ultrafast double-pulse laser-induced breakdown spectroscopy

The role of plasma shielding in collinear double-pulse femtosecond laser-induced breakdown spectroscopy

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