The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets

Daniel-Dennis Bubb, Stephen L. Johnson, Richard F. Haglund

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The mechanism of matrix-assisted resonant infrared laser ablation of frozen aqueous and methanol solutions of polymer was investigated by performing plume shadowgraphy and ablation yield measurements. A picosecond, tunable free-electron laser was tuned to two wavelengths in the target matrices, one (2940 nm) that was resonant with the-OH stretch in both water and methanol, and the other (3450 nm) that is resonant with the-CH stretch in methanol. The plume images showed gross similarities, differing only in the time required for the shockwave to appear and in the velocity of the shock front. Typically, 15-25 μs after the ablation laser pulse arrives the primary material ejection commences and lasts for hundreds of μs. In all three cases, the ablation plume appears to consist entirely of vapor with no droplets or solid particles. The ablation yield is either linear or quadratic in fluence. This dependence can be understood if we consider thermal diffusion in the targets and the temperature dependence of the absorption coefficient.

Original languageEnglish (US)
Title of host publicationConference on Lasers and Electro-Optics, CLEO 2009
StatePublished - Dec 1 2009
EventConference on Lasers and Electro-Optics, CLEO 2009 - Baltimore, MD, United States
Duration: May 31 2009Jun 5 2009

Other

OtherConference on Lasers and Electro-Optics, CLEO 2009
CountryUnited States
CityBaltimore, MD
Period5/31/096/5/09

Fingerprint

Ablation
ablation
plumes
alcohols
Alcohols
methyl alcohol
Infrared radiation
laser ablation
Methanol
shock fronts
thermal diffusion
matrices
tunable lasers
free electron lasers
ejection
infrared lasers
Thermal diffusion
Infrared lasers
Free electron lasers
absorptivity

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Atomic and Molecular Physics, and Optics

Cite this

Bubb, D-D., Johnson, S. L., & Haglund, R. F. (2009). The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets. In Conference on Lasers and Electro-Optics, CLEO 2009
Bubb, Daniel-Dennis ; Johnson, Stephen L. ; Haglund, Richard F. / The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets. Conference on Lasers and Electro-Optics, CLEO 2009. 2009.
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abstract = "The mechanism of matrix-assisted resonant infrared laser ablation of frozen aqueous and methanol solutions of polymer was investigated by performing plume shadowgraphy and ablation yield measurements. A picosecond, tunable free-electron laser was tuned to two wavelengths in the target matrices, one (2940 nm) that was resonant with the-OH stretch in both water and methanol, and the other (3450 nm) that is resonant with the-CH stretch in methanol. The plume images showed gross similarities, differing only in the time required for the shockwave to appear and in the velocity of the shock front. Typically, 15-25 μs after the ablation laser pulse arrives the primary material ejection commences and lasts for hundreds of μs. In all three cases, the ablation plume appears to consist entirely of vapor with no droplets or solid particles. The ablation yield is either linear or quadratic in fluence. This dependence can be understood if we consider thermal diffusion in the targets and the temperature dependence of the absorption coefficient.",
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Bubb, D-D, Johnson, SL & Haglund, RF 2009, The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets. in Conference on Lasers and Electro-Optics, CLEO 2009. Conference on Lasers and Electro-Optics, CLEO 2009, Baltimore, MD, United States, 5/31/09.

The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets. / Bubb, Daniel-Dennis; Johnson, Stephen L.; Haglund, Richard F.

Conference on Lasers and Electro-Optics, CLEO 2009. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets

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N2 - The mechanism of matrix-assisted resonant infrared laser ablation of frozen aqueous and methanol solutions of polymer was investigated by performing plume shadowgraphy and ablation yield measurements. A picosecond, tunable free-electron laser was tuned to two wavelengths in the target matrices, one (2940 nm) that was resonant with the-OH stretch in both water and methanol, and the other (3450 nm) that is resonant with the-CH stretch in methanol. The plume images showed gross similarities, differing only in the time required for the shockwave to appear and in the velocity of the shock front. Typically, 15-25 μs after the ablation laser pulse arrives the primary material ejection commences and lasts for hundreds of μs. In all three cases, the ablation plume appears to consist entirely of vapor with no droplets or solid particles. The ablation yield is either linear or quadratic in fluence. This dependence can be understood if we consider thermal diffusion in the targets and the temperature dependence of the absorption coefficient.

AB - The mechanism of matrix-assisted resonant infrared laser ablation of frozen aqueous and methanol solutions of polymer was investigated by performing plume shadowgraphy and ablation yield measurements. A picosecond, tunable free-electron laser was tuned to two wavelengths in the target matrices, one (2940 nm) that was resonant with the-OH stretch in both water and methanol, and the other (3450 nm) that is resonant with the-CH stretch in methanol. The plume images showed gross similarities, differing only in the time required for the shockwave to appear and in the velocity of the shock front. Typically, 15-25 μs after the ablation laser pulse arrives the primary material ejection commences and lasts for hundreds of μs. In all three cases, the ablation plume appears to consist entirely of vapor with no droplets or solid particles. The ablation yield is either linear or quadratic in fluence. This dependence can be understood if we consider thermal diffusion in the targets and the temperature dependence of the absorption coefficient.

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Bubb D-D, Johnson SL, Haglund RF. The influence of thermal confinement and temperaturedependent absorption on resonant infrared ablation of frozen aqueous and alcohol targets. In Conference on Lasers and Electro-Optics, CLEO 2009. 2009