Journal ArticleDOI
Ultrashort-pulse laser machining of dielectric materials
Michael D. Perry,Brent C. Stuart,P.S. Banks,Michael D. Feit,Victor Yanovsky,Alexander M. Rubenchik +5 more
TLDR
In this article, the authors show that high precision machining of all dielectrics (oxides, fluorides, explosives, teeth, glasses, ceramics, SiC, etc.) with no thermal shock or distortion of the remaining material by this mechanism is described.Abstract:
There is a strong deviation from the usual τ1/2 scaling of laser damage fluence for pulses below 10 ps in dielectric materials. This behavior is a result of the transition from a thermally dominated damage mechanism to one dominated by plasma formation on a time scale too short for significant energy transfer to the lattice. This new mechanism of damage (material removal) is accompanied by a qualitative change in the morphology of the interaction site and essentially no collateral damage. High precision machining of all dielectrics (oxides, fluorides, explosives, teeth, glasses, ceramics, SiC, etc.) with no thermal shock or distortion of the remaining material by this mechanism is described.read more
Citations
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Journal ArticleDOI
Enhancement of laser ablation yield by two color excitation
TL;DR: In this article, the authors present ablation results of silicon obtained by simultaneous irradiation of the sample with the fundamental beam of a picosecond-neodymium-vanadate (Nd:VAN) laser (1064 nm, 10 ps pulse duration) and a small amount of second harmonic (SH) produced in a thin nonlinear crystal.
Journal ArticleDOI
Characterization of Shear Strength and Bonding Energy of Laser Pro- duced Welding Seams in Glass
TL;DR: In this paper, the measurements of the shear strength and bonding energy for a number of laser welded soda-lime glass samples produced under different experimental conditions were presented, and the authors demonstrated that the bonding energy is affected differently by the processing parameters and presented a qualitative explanation of the observed results.
Journal ArticleDOI
Femtosecond laser scribing of Mo thin film on flexible substrate using axicon focused beam
TL;DR: In this paper, axicon focused laser pulses are used to produce narrow grooves and robustness of the scribing process is evaluated using femtosecond laser pulses focused by an axicon lens.
Journal ArticleDOI
The Jefferson Lab Free Electron Laser Program
TL;DR: The development of superconducting radio frequency (SRF) accelerator technology for CEBAF's nuclear physics program set the stage for its application to a number of other efforts.
Journal ArticleDOI
Experimental study on nanosecond-millisecond combined pulse laser drilling of alumina ceramic with different spot sizes
TL;DR: In this paper, a combined pulse laser (CPL) that consisting of an initial nanosecond pulse train followed by a millisecond pulse train was proposed for drilling the alumina ceramic.
References
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Tunnel ionization of complex atoms and of atomic ions in an altemating electromagnetic field
TL;DR: In this article, an expression for the probability of tunnel ionization in an alternating field, of a complex atom and of an atomic ion that are in an arbitrary state, was derived in the quasiclassical approximation n* $1.
Journal ArticleDOI
Nanosecond-to-femtosecond laser-induced breakdown in dielectrics
Brent C. Stuart,Michael D. Feit,S. Herman,Alexander M. Rubenchik,Bruce W. Shore,Michael D. Perry +5 more
TL;DR: A decreasing threshold fluence is found associated with a gradual transition from the long-pulse, thermally dominated regime to an ablative regime dominated by collisional and multiphoton ionization, and plasma formation.
Book
Quantum Processes in Semiconductors
TL;DR: In this paper, the energy and momentum conservation of phonon-impurity coupling in the diamond lattice is discussed. But the authors do not consider the effect of photo-ionization on photo-deionization of a hydrogenic acceptor.