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
Nanostructuring Borosilicate Glass With Near-Field Enhanced Energy Using a Femtosecond Laser Pulse
TL;DR: In this paper, a model based on the evolution of electron density derived from the Fokker-Planck equation has been built to describe ablation of dielectrics during femtosecond laser pulses.
Patent
Method of direct coulomb explosion in laser ablation of semiconductor structures
TL;DR: In this paper, a new technique and method of direct Coulomb explosion in laser ablation of Semiconductor Structures in semiconductor materials is described, which does not invoke or require the conventional avalanche photoionization mechanism, but utilizes direct interband absorption to generate the Coulomb threshold charge densities.
Journal ArticleDOI
Development of a Laser Based Process Chain for Manufacturing Freeform Optics
TL;DR: In this article, the current state of the development of a laser-based process chain for manufacturing fused silica optics is presented, in which a first step fused-silica is ablated with laser radiation to produce the geometry of the optics, a subsequent polishing step reduces the surface roughness and a third step uses micro ablation to remove the last remaining redundant material.
Journal ArticleDOI
Dominance of mechanical over thermally induced damage during femtosecond laser ablation of monazite
Anne-Magali Seydoux-Guillaume,Rémi Freydier,Franck Poitrasson,François-Xavier d'Abzac,Richard Wirth,Lucien Datas +5 more
TL;DR: In this paper, the effects of infrared femtosecond laser ablation on monazite micro-and nano-structure were investigated, and cracks formed at the surface and propagated over 2 μm into the crystal.
Patent
Systems and methods of glass cutting by inducing pulsed laser perforations into glass articles
Dana Craig Bookbinder,Lewis Kirk Klingensmith,Stephan Lvovich Logunov,Albert Roth Nieber,Helmut Schillinger,Pushkar Tandon,Sergio Tsuda +6 more
TL;DR: In this paper, the authors proposed a method of laser cutting a laser wavelength transparent glass article by feeding at least one glass article to a pulsed laser assembly having at least 1 pulsed Lidar, wherein the pulsed lidar defines a laser beam focal line with a length of 0.1-100 mm.
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.