Spallative ablation of dielectrics by X-ray laser

A short laser pulse in wide range of wavelengths, from infrared to X-ray, disturbs electron–ion equilibrium and increases pressure in a heated layer. The case where the pulse duration τL is shorter than acoustic relaxation time ts is considered in the paper. It is shown that this short pulse may cause thermomechanical phenomena such as spallative ablation regardless of wavelength. While the physics of electron–ion relaxation strongly depends on wavelength and various electron spectra of substances: there are spectra with an energy gap in semiconductors and dielectrics opposed to gapless continuous spectra in metals. The paper describes entire sequence of thermomechanical processes from expansion, nucleation, foaming, and nanostructuring to spallation with particular attention to spallation by X-ray pulse.

[1]  K. Nishihara,et al.  Dynamics of plume and crater formation after action of femtosecond laser pulse , 2007 .

[2]  K. Nishihara,et al.  New mechanism of the formation of the nanorelief on a surface irradiated by a femtosecond laser pulse , 2008 .

[3]  S. V. Bulanov,et al.  Submicrometer-resolution in situ imaging of the focus pattern of a soft x-ray laser by color center formation in LiF crystal. , 2009, Optics letters.

[4]  Masaharu Nishikino,et al.  Characterization of a high-brilliance soft x-ray laser at 13.9 nm by use of an oscillator-amplifier configuration. , 2008, Applied optics.

[5]  S. Anisimov,et al.  Rarefaction wave and gravitational equilibrium in a two-phase liquid-vapor medium , 1999 .

[6]  Baerbel Rethfeld.  Free-electron generation in laser-irradiated dielectrics , 2006 .

[7]  Klaus Sokolowski-Tinten,et al.  Transient States of Matter during Short Pulse Laser Ablation , 1998 .

[8]  P. Di Lazzaro,et al.  Point defects in lithium fluoride by EUV and soft X-rays exposure for X-ray microscopy and optical applications , 2004, IEEE Journal of Selected Topics in Quantum Electronics.

[9]  A. Ustione,et al.  Scanning near-field optical microscopy images of microradiographs stored in lithium fluoride films with an optical resolution of λ∕12 , 2006 .

[10]  Jan Siegel,et al.  Time- and space-resolved dynamics of melting, ablation, and solidification phenomena induced by femtosecond laser pulses in germanium , 2006 .

[11]  Nail Inogamov,et al.  Ablation by ultrashort laser pulses: Atomistic and thermodynamic analysis of the processes at the ablation threshold , 2008 .

[12]  Zhibin Lin,et al.  Atomistic Modeling of Short Pulse Laser Ablation of Metals: Connections between Melting, Spallation, and Phase Explosion† , 2009 .

[13]  Chunlei Guo,et al.  Colorizing metals with femtosecond laser pulses , 2008 .

[14]  A. Miotello,et al.  Laser-induced phase explosion: new physical problems when a condensed phase approaches the thermodynamic critical temperature , 1999 .

[15]  K. Nishihara,et al.  Nanospallation induced by an ultrashort laser pulse , 2008 .

[16]  Katsunobu Nishihara,et al.  Laser ablation and spallation of crystalline aluminum simulated by molecular dynamics , 2008 .

[17]  A. V. Kilpio,et al.  The spall strength limit of matter at ultrahigh strain rates induced by laser shock waves , 2002 .

[18]  Libor Juha,et al.  Conductors, semiconductors, and insulators irradiated with short-wavelength free-electron laser , 2007 .

[19]  Francesco Flora,et al.  High-resolution imaging of a soft-X-ray laser beam by color centers excitation in lithium fluoride crystals , 2003 .

[20]  Perry,et al.  Nanosecond-to-femtosecond laser-induced breakdown in dielectrics. , 1996, Physical review. B, Condensed matter.

[21]  D. Linde,et al.  Breakdown Threshold and Plasma Formation in Femtosecond Laser-Solid Interaction , 1994, High Field Interactions and Short Wavelength Generation.

[22]  J. Kuba,et al.  Ablation of solids using a femtosecond extreme ultraviolet free electron laser , 2006 .

[23]  Fabien Quere,et al.  Time-resolved study of laser-induced breakdown in dielectrics , 2001 .

[24]  Katsunobu Nishihara,et al.  Molecular dynamics simulation of femtosecond ablation and spallation with different interatomic potentials , 2009 .

[25]  D. Murra,et al.  Soft x-ray submicron imaging detector based on point defects in LiF , 2005 .

[26]  D. Cahill,et al.  Solidification velocities in deeply undercooled silver. , 2009, Physical review letters.

[27]  D. Eliezer,et al.  Laser-induced tension to measure the ultimate strength of metals related to the equation of state , 2002 .

[28]  J Nilsen,et al.  Damage and ablation of large bandgap dielectrics induced by a 46.9 nm laser beam. , 2006, Optics letters.

[29]  Yu. V. Petrov,et al.  Two-temperature relaxation and melting after absorption of femtosecond laser pulse , 2008, 0812.2965.

[30]  M. Meunier,et al.  Thermodynamic pathways to melting, ablation, and solidification in absorbing solids under pulsed laser irradiation , 2006 .

[31]  Miss A.O. Penney.  (b) , 1974, The New Yale Book of Quotations.

[32]  Yoshiaki Kato,et al.  Low-threshold ablation of dielectrics irradiated by picosecond soft x-ray laser pulses , 2009 .

[33]  J Gautier,et al.  Non-thermal desorption/ablation of molecular solids induced by ultra-short soft x-ray pulses. , 2009, Optics express.

[34]  Yu. V. Petrov,et al.  Expansion of matter heated by an ultrashort laser pulse , 1999 .

[35]  Jan Siegel,et al.  Transient reflectivity and transmission changes during plasma formation and ablation in fused silica induced by femtosecond laser pulses , 2008 .