Publication
Elastic properties of self-organized nanogratings produced by femtosecond laser exposure of fused silica
Publications associées (44)
A 1.5-W frequency-doubled semiconductor disk laser tunable over 40 nm at around 745 nm
Elyahou Kapon, Vladimir Iakovlev, Alexei Sirbu
We report on a semiconductor disk laser emitting 1.5 W of output power at the wavelength of 745 nm via intracavity frequency doubling. The high power level and the >40 nm tuning range make the laser a promising tool for medical treatments that rely on phot ...
Spie-Int Soc Optical Engineering2016Laser from a many-body correlated medium
Vincenzo Savona, Hugo Pierre Alexandre Flayac, Eduardo Carlo Mascarenhas Moraes
We consider a nonequilibrium system of interacting emitters described by the XXZ model, whose excitonic transitions are spatially and spectrally coupled to a single mode cavity. We demonstrate that the output radiation field is sensitive to an interplay be ...
Amer Physical Soc2016Spatial multistability induced by cross interactions of confined polariton modes
Benoît Marie Joseph Deveaud, Daniel Oberli, François Morier-Genoud, Marcia Portella Oberli, Claudéric Ouellet-Plamondon, Grégory Chilpéric Sallen
We demonstrate the occurrence of spatial multistability using laterally confined microcavity exciton-polaritons. By coherently exciting with a blue detuned laser a series of confined polariton modes, we investigate the effects of multistability on the tran ...
Amer Physical Soc2016Intrinsic emittance reduction of copper cathodes by laser wavelength tuning in an rf photoinjector
Christoph Peter Hauri, Thomas Schietinger
With the improvement of acceleration techniques, the intrinsic emittance of the cathode has a strong impact on the final brightness of a free electron laser. The systematic studies presented in this paper demonstrate for the first time in a radiofrequency ...
American Physical Society2015Study and Modelling of the Melt Pool Dynamics during Selective Laser Sintering and Melting
Selective laser sintering (SLS) and Selective Laser Melting (SLM) are parent layer manufacturing processes that allow generating complex 3D parts by consolidating layers of powder material on top of each other. Consolidation is obtained by processing the s ...
EPFL2015Study of physical phenomena of selective laser melting towards increased productivity
This thesis presents an experimentally focused study of three of the key physical phenomena of the Selective Laser Melting (SLM) process. The SLM process increasingly gains momentum in industrial applications. As awareness of the process and its capabiliti ...
EPFL2015Annealing of UV Ar+ and ArF excimer laser fabricated Bragg gratings: SMF-28e fiber
Hans Georg Limberger, Georgios Violakis
Fiber Bragg gratings fabricated in pristine SMF-28e fibers using pulsed ArF-excimer and cw 244-nm Ar+ laser were annealed using tempering rates from 0.0038 to 0.25 K/s. Demarcation energy mapping allowed for the determination of the frequency factors and t ...
Optical Society of America2014Laser-assisted growth of carbon nanotubes on laser-patterned substrates and inside sealed micro-channels
Carbon nanotube assemblies can be used for specific applications such as sensors and filters. We present a method and proof-of-concept to directly grow vertically-aligned carbon nanotube structures within sealed enclosures by means of a feedback-controlled ...
SPIE-INT SOC OPTICAL ENGINEERING2014Study of the inter-particle necks in selective laser sintering
Rémy Glardon, Jamasp Jhabvala, Eric Boillat
Purpose – Since pulsed lasers are mainly used in selective laser sintering (SLS) – contrarily to selective laser melting (SLM) – only the exterior of the powder particles is molten while their core stays solid. The purpose of this paper is to investigate t ...
Emerald2013The quest for the most spherical bubble: experimental setup and data overview
Mohamed Farhat, Nicolas Dorsaz, Danail Obreschkow, Philipp Kobel, Aurèle De Bosset, Marc Tinguely
We describe a recently realized experiment producing the most spherical cavitation bubbles today. The bubbles grow inside a liquid from a point plasma generated by a nanosecond laser pulse. Unlike in previous studies, the laser is focussed by a parabolic m ...
Springer Verlag2013