Optical breakdown processing: Influence of the ambient gas on the properties of the nanostructured Si-based layers formed

2004 ◽  
Vol 95 (10) ◽  
pp. 5722-5728 ◽  
Author(s):  
D.-Q. Yang ◽  
A. V. Kabashin ◽  
V.-G. Pilon-Marien ◽  
E. Sacher ◽  
M. Meunier
Keyword(s):  
Optical Breakdown ◽  
Ambient Gas ◽  
Nanostructured Si

QUANTITATIVE ANALYSES OF FUEL SPRAY-AMBIENT GAS INTERACTION BY MEANS OF LIF-PIV TECHNIQUE

2011 ◽  
Vol 21 (6) ◽  
pp. 447-465 ◽  
Author(s):  
Jingyu Zhu ◽  
Keiya Nishida ◽  
Olawole Abiola Kuti ◽  
Seoksu Moon
Keyword(s):  
Fuel Spray ◽  
Piv Technique ◽  
Quantitative Analyses ◽  
Ambient Gas

Optical breakdown thresholds in helium

1967 ◽  
Vol 3 (6) ◽  
pp. 264 ◽  
Author(s):  
J.W. Gardner
Keyword(s):  
Optical Breakdown

scholarly journals Femtosecond-Laser Assisted Surgery of the Eye: Overview and Impact of the Low-Energy Concept

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 122
Author(s):  
Catharina Latz ◽  
Thomas Asshauer ◽  
Christian Rathjen ◽  
Alireza Mirshahi
Keyword(s):  
Surgical Techniques ◽  
Numerical Aperture ◽  
Optical Breakdown ◽  
Pulse Frequency ◽  
Low Energy ◽  
Human Cornea ◽  
Energy Concept ◽  
High Pulse Frequency ◽  
Fs Laser ◽  
High Pulse

This article provides an overview of both established and innovative applications of femtosecond (fs)-laser-assisted surgical techniques in ophthalmology. Fs-laser technology is unique because it allows cutting tissue at very high precision inside the eye. Fs lasers are mainly used for surgery of the human cornea and lens. New areas of application in ophthalmology are on the horizon. The latest improvement is the high pulse frequency, low-energy concept; by enlarging the numerical aperture of the focusing optics, the pulse energy threshold for optical breakdown decreases, and cutting with practically no side effects is enabled.

Surface Laser Plasma in Laser Treatment of Materials in High Pressure Gases

1991 ◽  
Vol 236 ◽  
Author(s):  
A. Smirnov ◽  
C. Dupuy ◽  
G. Flamant
Keyword(s):  
High Pressure ◽  
Laser Treatment ◽  
Laser Plasma ◽  
Holographic Interferometry ◽  
Aerosol Particles ◽  
Optical Breakdown ◽  
Plasma Generation ◽  
Additional Information ◽  
Surface Laser ◽  
Condensation Front

AbstractUsing holographic interferometry the surface laser plasma generation in high pressure gases has been investigated. Additional information about the generation of surface cover laser plasma, optical breakdown in the presence of aerosol particles and condensation front forming in high pressure gases is given.

scholarly journals Reflecting petawatt lasers off relativistic plasma mirrors: a realistic path to the Schwinger limit

2021 ◽  
Vol 9 ◽  
Author(s):  
Fabien Quéré ◽  
Henri Vincenti
Keyword(s):  
Light Intensity ◽  
High Power ◽  
Quantum Electrodynamics ◽  
Laser Light ◽  
Optical Breakdown ◽  
Relativistic Plasma ◽  
Laser Beams ◽  
Relativistic Motion ◽  
Quantum Vacuum ◽  
High Power Lasers

Abstract The quantum vacuum plays a central role in physics. Quantum electrodynamics (QED) predicts that the properties of the fermionic quantum vacuum can be probed by extremely large electromagnetic fields. The typical field amplitudes required correspond to the onset of the ‘optical breakdown’ of this vacuum, expected at light intensities >4.7×1029 W/cm2. Approaching this ‘Schwinger limit’ would enable testing of major but still unverified predictions of QED. Yet, the Schwinger limit is seven orders of magnitude above the present record in light intensity achieved by high-power lasers. To close this considerable gap, a promising paradigm consists of reflecting these laser beams off a mirror in relativistic motion, to induce a Doppler effect that compresses the light pulse in time down to the attosecond range and converts it to shorter wavelengths, which can then be focused much more tightly than the initial laser light. However, this faces a major experimental hurdle: how to generate such relativistic mirrors? In this article, we explain how this challenge could nowadays be tackled by using so-called ‘relativistic plasma mirrors’. We argue that approaching the Schwinger limit in the coming years by applying this scheme to the latest generation of petawatt-class lasers is a challenging but realistic objective.

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