Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Concept

Femtosecond

Publications associées (29)

From structure to structural dynamics: Ahmed Zewail's legacy

Majed Chergui

In this brief tribute to Ahmed Zewail, we highlight and place in the historical context, several of the major achievements that he and his colleagues have made in Femtochemistry (of which he was the principal instigator) and his introduction of ultrafast e ...

Amer Inst Physics2017

Several Semiclassical Approaches to Time-resolved Spectroscopy

Jiri Vanicek

Ultrafast spectroscopy allows molecular dynamics to be resolved on the femtosecond time scale. Whereas such short time scales obviously pose any experimental challenges, they provide an opportunity for semiclassica methods, which are naturally suited for s ...

Swiss Chemical Soc2017

3D monolithic dielectrophoretic actuators and resonators written by femtosecond laser

Tao Yang

The last few decades have witnessed exciting advances in micro-opto-electro-mechanical systems (MOEMS) including revolutionary development of fabrication processes and an ever increasing expansion of their domain of applications. In parallel, femtosecond l ...

EPFL2017

Charge migration and charge transfer in molecular systems

Ursula Röthlisberger, Majed Chergui, Jacques-Edouard Moser, Joël Teuscher, Andrea Cannizzo, Christopher Alexander Arrell, Natalie Renuka Banerji, Elisa Liberatore, Pablo Lopez Tarifa

The transfer of charge at the molecular level plays a fundamental role in many areas of chemistry, physics, biology and materials science. Today, more than 60 years after the seminal work of R. A. Marcus, charge transfer is still a very active field of res ...

2017

MIR supercontinuum in all-normal dispersion Chalcogenide photonic crystal fibers pumped with 2μm femtosecond laser

Camille Sophie Brès, Jianqi Hu, Davide Grassani, Svyatoslav Kharitonov, Sida Xing

We demonstrate mid-infrared supercontinuum generation in an all-normal dispersion Chalcogenide PCF pumped by fiber laser. The -20dB bandwidth is 1.7~2.7μm dominated by self-phase modulation and optical wave breaking. Tapering is proposed to improve perform ...

OSA2017

Plasmon-less surface enhanced Raman spectra induced by self-organized networks of silica nanoparticles produced by femtosecond lasers

Yves Bellouard, Erica Kathleen Block

Raman spectroscopy is the workhorse for label-free analysis of molecules. It relies on the inelastic scattering of incoming monochromatic light impinging molecules of interest. This effect leads to a very weak emission of light spectrum that provides a sig ...

Optical Soc Amer2017

Octave-spanning dissipative Kerr soliton frequency combs in Si3N4 microresonators

Tobias Kippenberg, Junqiu Liu, Maxim Karpov, Martin Hubert Peter Pfeiffer, Hairun Guo, Erwan Guillaume Albert Lucas, Michail Zervas

Octave-spanning, self-referenced frequency combs are applied in diverse fields ranging from precision metrology to astrophysical spectrometer calibration. The octave-spanning optical bandwidth is typically generated through non-linear spectral broadening o ...

Optical Soc Amer2017

Revealing the role of electrons and phonons in the ultrafast recovery of charge density wave correlations in 1T-TiSe2

Matthias Wolf, Helmuth Berger, Arnaud Magrez

Using time-and angle-resolved photoemission spectroscopy with selective near-and midinfrared photon excitations, we investigate the femtosecond dynamics of the charge density wave ( CDW) phase in 1T-TiSe2 as well as the dynamics of CDW fluctuations at 240 ...

Amer Physical Soc2016

Ultrafast Relaxation Dynamics of the Ethylene Cation C

Ursula Röthlisberger, Pablo Lopez Tarifa, Elisa Liberatore

We present a combined experimental and computational study of the relaxation dynamics of the ethylene cation. In the experiment, we apply an extreme-ultraviolet-pump/infrared-probe scheme that permits us to resolve time scales on the order of 10 fs. The ph ...

2016