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Concept

Supercontinuum

Publications associées (31)

2D Fourier Transform Spectroscopy Setup and Ultrafast Dynamics of Porphyrins

Andre Al Haddad

The first section of the thesis discusses the development and implementation of a two dimensional Fourier transform spectroscopy setup, that permits the recording of electronic 2D spectra in the visible regime. A hollow core fiber was used to generate broa ...

EPFL2015

Femtosecond laser-based production of 3D micro- and nano-devices in transparent substrate: a step toward system-materials

Yves Bellouard

Femtosecond laser irradiation applied to Fused Silica (the amorphous form of SiO2) defines a novel technology platform for highly integrated all-optical microsystems and beyond. In contrast with common approaches that rely on combining materials to achieve ...

Spie-Int Soc Optical Engineering2015

Sub-femtosecond precision measurement of relative X-ray arrival time for free-electron lasers

Christoph Peter Hauri, Christoph Bostedt

Today's brightest coherent X-ray sources, X-ray free-electron lasers, produce ultrafast X-ray pulses for which full-width at half-maximum durations as short as 3 fs have been measured(1). There has been a marked increase in the popularity of such short pul ...

Nature Publishing Group2014

Theories of Experimentally Observed Excitation Spectra of Square Lattice Antiferromagnets

Bastien Dalla Piazza

The first part of this thesis presents the theoretical study of an anomaly of unknown origin in the excitation spectrum of the Quantumspin-1/2 Heisenberg Square lattice Anti-Ferromagnet. The anomaly manifests itself in Inelastic Neutron Scattering data for ...

EPFL2014

Generation of 0.9-mJ THz pulses in DSTMS pumped by a Cr:Mg2SiO4 laser

Christoph Peter Hauri

We report on high-field terahertz transients with 0.9-mJ pulse energy produced in a 400 mm(2) partitioned organic crystal by optical rectification of a 30-mJ laser pulse centered at 1.25 mu m wavelength. The phase-locked single-cycle terahertz pulses cover ...

Optical Society of America2014

Femtosecond photoelectron and photoion spectrometer with vacuum ultraviolet probe pulses

Jakob Grilj

We describe a femtosecond photoelectron and photoion spectroscopy setup using a simple, novel way to produce a vacuum ultraviolet (VUV) probe pulse. We isolate the femtosecond VUV pulse from a high harmonic continuum by using the bandpass characteristics o ...

Elsevier2014

High/room temperature mechanical properties of 3Y-TZP/CNTs composites

Robert Schaller, Mehdi Mazaheri

Spark Plasma Sintering (SPS) method was practiced, in the current investigation, to obtain fully dense materials with an excellent dispersion of MWCNTs (Multi-walled Carbon Nanotubes) within the matrix. Scanning and transmission electron microscopy microgr ...

Elsevier Sci Ltd2014

Mid-infrared optical frequency combs at 2.5 mu m based on crystalline microresonators

Tobias Kippenberg, Tobias Herr, Albert Schliesser

The mid-infrared spectral range (lambda similar to 2-20 mu m) is of particular importance as many molecules exhibit strong vibrational fingerprints in this region. Optical frequency combs-broadband optical sources consisting of equally spaced and mutually ...

Nature Publishing Group2013

A femtosecond fluorescence study of vibrational relaxation and cooling dynamics of UV dyes

Majed Chergui, Thomas James Penfold, Andrea Cannizzo, Olivier Christian Bräm

We present a femtosecond broad-band fluorescence up-conversion study of the vibrational relaxation dynamics of two UV chromophores, 2,5-diphenyloxazole (PPO) and para-terphenyl (pTP), pumped with a large excess of vibrational energy (>2000 cm(-1)). The ban ...

2012

Probing molecular absorption under slow-light propagation using a photonic crystal waveguide

Luc Thévenaz, Isabelle Dicaire

High-resolution infrared absorption spectroscopy of acetylene gas is demonstrated in a dispersion-engineered photonic crystal waveguide under slow-light propagation. Experimental enhancement factors of 0.31 and 1.00 are obtained for TE and TM polarization, ...

2012

Vibrationally bond-selected chemisorption of methane isotopologues on Pt(111) studied by reflection absorption infrared spectroscopy

Rainer Beck, Li Chen, Régis Bisson, Hirokazu Ueta, Li Chen

Reflection absorption infrared spectroscopy (RAIRS) was used to probe for vibrational bond-selectivity in the dissociative chemisorption of three partially deuterated methane isotopologues on a Pt(111) surface. While a combination of incident translational ...

Royal Society of Chemistry2012