Rémi Meyer
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View article: Sub-kelvin measurement of silicon thermal expansion with a Fabry-Pérot cavity stabilized laser
Sub-kelvin measurement of silicon thermal expansion with a Fabry-Pérot cavity stabilized laser Open
In this letter, we report the measurement of the coefficient of thermal expansion (CTE) of single-crystal silicon from 655 mK to 16 K using an ultra-stable laser based on a single-crystal silicon Fabry-Perot cavity. Below 1 K temperatures,…
View article: Guidelines for designs for ultrastable laser with $\mathbf{10^{-17}}$ fractional frequency instability
Guidelines for designs for ultrastable laser with $\mathbf{10^{-17}}$ fractional frequency instability Open
Lasers with long coherence time and narrow linewidth are an essential tool for quantum sensors and clocks. Ultrastable cavities and laser systems are now commercially available with fractional frequency instabilities in the mid $10^{-16}$ …
View article: A variable-field permanent-magnet dipole for accelerators
A variable-field permanent-magnet dipole for accelerators Open
A new concept for a variable-field permanent-magnet dipole has been developed and fabricated at Los Alamos. The application requires an extremely uniform dipole field in the magnet aperture and precision variability over a large operating …
View article: Synchronous phase and energy measurement system for a 6. 7-MeV H beam
Synchronous phase and energy measurement system for a 6. 7-MeV H beam Open
A noninterceptive measurement system has been built to measure the energy and synchronous phase of a 6.7-MeV proton beam drifting from the ramped-gradient, drift-tube linac (RGDTL) in the accelerator test stand (ATS) facility. Axially-symm…
View article: SNS LINAC Wire Scanner System : Signal Levels and Accuracy.
SNS LINAC Wire Scanner System : Signal Levels and Accuracy. Open
The linac wire scanner system for the Spallation Neutron Source (SNS) at Oak Ridge, TN, USA, calls for 5 units in the medium energy beam transport (MEBT), 5 in the drift tube linac (DTL), and 10 in the coupled cavity linac (CCL). In this p…
View article: Generation of high-aspect ratio, dense nano-plasmas in solid dielectrics with femtosecond Bessel
Generation of high-aspect ratio, dense nano-plasmas in solid dielectrics with femtosecond Bessel Open
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View article: Femtosecond laser-induced sub-wavelength plasma inside dielectrics: II. Second-harmonic generation
Femtosecond laser-induced sub-wavelength plasma inside dielectrics: II. Second-harmonic generation Open
Second-harmonic emission at a frequency that is twice the laser frequency is an important diagnostic for nonlinear laser-plasma interaction. It is forbidden for centrosymmetric materials such as the bulk of sapphire. The symmetry, however,…
View article: Ultrafast Bessel beam-induced nanoplasmas in solid dielectrics
Ultrafast Bessel beam-induced nanoplasmas in solid dielectrics Open
International audience
View article: Femtosecond laser-induced sub-wavelength plasma inside dielectrics. II. Second-harmonic generation
Femtosecond laser-induced sub-wavelength plasma inside dielectrics. II. Second-harmonic generation Open
Second-harmonic emission at a frequency that is twice the laser frequency is an important diagnostic for nonlinear laser–plasma interaction. It is forbidden for centrosymmetric materials such as the bulk of sapphire. The symmetry, however,…
View article: Femtosecond laser-induced sub-wavelength plasma inside dielectrics: I. Field enhancement
Femtosecond laser-induced sub-wavelength plasma inside dielectrics: I. Field enhancement Open
The creation of high-energy-density (≳106 joules per cm3) over-critical plasmas in a large volume has essential applications in the study of warm dense matter, being present in the hot cores of stars and planets. It was recently shown that…
View article: Femtosecond laser-induced sub-wavelength plasma inside dielectrics: I. Field enhancement
Femtosecond laser-induced sub-wavelength plasma inside dielectrics: I. Field enhancement Open
The creation of high energy density ($\gtrsim10^6$ joules per cm$^3$) over-critical plasmas in a large volume has essential applications in the study of warm dense matter, being present in the hot cores of stars and planets. It was recentl…
View article: Driving resonance absorption with Bessel beams in the bulk of dielectrics
Driving resonance absorption with Bessel beams in the bulk of dielectrics Open
International audience
View article: High energy density plasma mediated by collisionless resonance absorption inside dielectrics
High energy density plasma mediated by collisionless resonance absorption inside dielectrics Open
We demonstrate for the first time to our knowledge the generation of overcritical plasma densities inside transparent solids over long distances using femtosecond laser pulses. This opens new avenues for high energy density physics in conf…
View article: A new route to high energy density inside the bulk of transparent materials
A new route to high energy density inside the bulk of transparent materials Open
Generating large volumes of dense plasmas with femtosecond laser pulses is key to important applications such as the development of extreme UV sources, of laser material processing and of fundamental research such as the synthesis of warm …
View article: Synchronization of ultrafast pulses and pulse front tilt removal inside samples
Synchronization of ultrafast pulses and pulse front tilt removal inside samples Open
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View article: High energy density deposition inside the bulk of dielectrics via resonance absorption
High energy density deposition inside the bulk of dielectrics via resonance absorption Open
International audience
View article: Extreme absorption in the bulk of dielectrics with femtosecond Bessel pulses
Extreme absorption in the bulk of dielectrics with femtosecond Bessel pulses Open
International audience
View article: In-situ diagnostic of femtosecond probes for high resolution ultrafast imaging
In-situ diagnostic of femtosecond probes for high resolution ultrafast imaging Open
Ultrafast imaging is essential in physics and chemistry to investigate the femtosecond dynamics of nonuniform samples or of phenomena with strong spatial variations. It relies on observing the phenomena induced by an ultrashort laser pump …
View article: Confinement of laser-matter interaction with shaped femtosecond pulses in dielectrics
Confinement of laser-matter interaction with shaped femtosecond pulses in dielectrics Open
International audience
View article: Extremely high-aspect-ratio ultrafast Bessel beam generation and stealth dicing of multi-millimeter thick glass
Extremely high-aspect-ratio ultrafast Bessel beam generation and stealth dicing of multi-millimeter thick glass Open
We report on the development of an ultrafast beam shaper capable of generating Bessel beams of high cone angle that maintain a high-intensity hot spot with subwavelength diameter over a propagation distance in excess of 8~mm. This generate…
View article: Novel axicon-based optical design for generation of ultrahigh aspect ratio Bessel beam and application to thick glass dicing
Novel axicon-based optical design for generation of ultrahigh aspect ratio Bessel beam and application to thick glass dicing Open
International audience
View article: Ultrafast Bessel beams; advanced tools for laser materials processing
Ultrafast Bessel beams; advanced tools for laser materials processing Open
Ultrafast Bessel beams demonstrate a significant capacity of structuring transparent materials with high degree of accuracy and exceptional aspect ratio. The ability to localize energy on the nanometer scale (bypassing the 100 nm milestone…
View article: Filamentation of Bessel and Bessel-like beams in solids. Applications to materials processing
Filamentation of Bessel and Bessel-like beams in solids. Applications to materials processing Open
International audience
View article: Ultrafast Bessel beams: advanced tools for laser materials processing
Ultrafast Bessel beams: advanced tools for laser materials processing Open
Ultrafast Bessel beams demonstrate a significant capacity of structuring transparent materials with a high degree of accuracy and exceptional aspect ratio. The ability to localize energy on the nanometer scale (bypassing the 100-nm milesto…
View article: Stealth dicing with ultrafast Bessel beams with engineered transverse profiles
Stealth dicing with ultrafast Bessel beams with engineered transverse profiles Open
International audience
View article: High speed cleaving of crystals with ultrafast Bessel beams
High speed cleaving of crystals with ultrafast Bessel beams Open
We develop a novel concept for ultra-high speed cleaving of crystalline materials with femtosecond lasers. Using Bessel beams in single shot, fracture planes can be induced nearly all along the Bessel zone in sapphire. For the first time, …
View article: High aspect ratio micro-explosions in the bulk of sapphire generated by femtosecond Bessel beams
High aspect ratio micro-explosions in the bulk of sapphire generated by femtosecond Bessel beams Open
Femtosecond pulses provide an extreme degree of confinement of light matter-interactions in high-bandgap materials because of the nonlinear nature of ionization. It was recognized very early on that a highly focused single pulse of only na…